Fix metaprogramming

[roystgnr]

This compiles on gcc 6.1 and passes all the non-Antioch-based tests for me. I'll try to get a new Antioch built to work around #410 so I can check those too shortly, but I think if we still pass "make check" on your system then we ought to be safe to merge.

[pbauman]

Thanks for fixing this. Somehow I missed GCC 6.1 was out. I'll build a tree right now and merge this when I verify on my end.

[pbauman]

OK, this works for me. Sadly, it also works for without this PR and GCC 6.1. O_O I'm going to try and experiment a little more to try and replicate the failures that @roystgnr got and I should be getting before merging.

[pbauman]

Dammit. I cannot reproduce the compilation failures on my system. Just to record, here's what GRINS is emitting at configure time (this is on the 0.7.0-prep branch, METHOD=devel):

----------------------------------- SUMMARY -----------------------------------
Package version............... : grins-0.7.0
C++ compiler.................. : mpic++
C++ compiler flags............ : -O2 -felide-constructors -g -pedantic -W -Wall -Wextra -Wno-long-long -Wunused -Wpointer-arith -Wformat -Wparentheses -Wuninitialized -funroll-loops -fstrict-aliasing -Woverloaded-virtual -Wdisabled-optimization -fopenmp
Install dir................... : /fry1/data/users/pbauman/research/grins/install/0.7.0-prep/devel
Build user.................... : pbauman
Build host.................... : fry.eng.buffalo.edu
Configure date................ : 2016-05-31 10:22
Build architecture............ : x86_64-unknown-linux-gnu
Revision id................... : 0dd005a5dae5f4fbf499df1ac750abeedfc822fb
Library Dependencies:
libMesh....................... : /fry1/data/shared/software/libs/libmesh/master/gcc/6.1.0/mpich/3.1.4/petsc/3.6.3/openblas/0.2.14/boost/1.58.0/hdf5/1.8.16/vtk/6.3.0
libMesh CXXFLAGS.............. : -O2 -felide-constructors -g -pedantic -W -Wall -Wextra -Wno-long-long -Wunused -Wpointer-arith -Wformat -Wparentheses -Wuninitialized -funroll-loops -fstrict-aliasing -Woverloaded-virtual -Wdisabled-optimization -fopenmp
libMesh INCLUDE............... : -I/fry1/data/shared/software/libs/libmesh/master/gcc/6.1.0/mpich/3.1.4/petsc/3.6.3/openblas/0.2.14/boost/1.58.0/hdf5/1.8.16/vtk/6.3.0/include -I/fry1/data/shared/software/libs/hdf5/1.8.16/gcc/6.1.0/include -I/fry1/data/shared/software/libs/vtk/6.3.0/gcc/6.1.0/include/vtk-6.3 -I/usr/include -I/fry1/data/shared/software/libs/petsc/3.6.3/gcc/6.1.0/mpich/3.1.4/openblas/0.2.14/opt/include -I/fry1/data/shared/software/libs/petsc/3.6.3/gcc/6.1.0/mpich/3.1.4/openblas/0.2.14/opt//include -I/fry1/data/shared/software/libs/mpich/3.1.4/gcc/6.1.0/include -I/fry1/data/shared/software/libs/boost/1.58.0/gcc/6.1.0/include
libMesh LDFLAGS............... :
libMesh LIBS.................. : -L/fry1/data/shared/software/libs/hdf5/1.8.16/gcc/6.1.0/lib -lhdf5 -lhdf5_cpp -Wl,-rpath,/fry1/data/shared/software/libs/hdf5/1.8.16/gcc/6.1.0/lib -Wl,-rpath,/fry1/data/shared/software/libs/vtk/6.3.0/gcc/6.1.0/lib -L/fry1/data/shared/software/libs/vtk/6.3.0/gcc/6.1.0/lib -lvtkIOCore-6.3 -lvtkCommonCore-6.3 -lvtkCommonDataModel-6.3 -lvtkFiltersCore-6.3 -lvtkIOXML-6.3 -lvtkImagingCore-6.3 -lvtkIOImage-6.3 -lvtkImagingMath-6.3 -lvtkIOParallelXML-6.3 -lz -ltbb -ltbbmalloc -L/fry1/data/shared/software/libs/petsc/3.6.3/gcc/6.1.0/mpich/3.1.4/openblas/0.2.14/opt/lib -lpetsc -Wl,-rpath,/fry1/data/shared/software/libs/petsc/3.6.3/gcc/6.1.0/mpich/3.1.4/openblas/0.2.14/opt/lib -lsuperlu_dist_4.1 -lcmumps -ldmumps -lsmumps -lzmumps -lmumps_common -lpord -lscalapack -lsuperlu_4.3 -lHYPRE -L/fry1/data/shared/software/libs/mpich/3.1.4/gcc/6.1.0/lib -L/fry1/data/shared/software/apps/gcc/6.1.0/lib/gcc/x86_64-pc-linux-gnu/6.1.0 -L/fry1/data/shared/software/apps/gcc/6.1.0/lib64 -L/fry1/data/shared/software/apps/gcc/6.1.0/lib -Wl,-rpath,/fry1/data/shared/software/libs/openblas/0.2.14/gcc/6.1.0/lib -L/fry1/data/shared/software/libs/openblas/0.2.14/gcc/6.1.0/lib -lopenblas -lparmetis -lmetis -lX11 -lssl -lcrypto -lmpifort -lgfortran -lquadmath -lm -lmpicxx -lstdc++ -Wl,-rpath,/fry1/data/shared/software/apps/gcc/6.1.0/lib/gcc/x86_64-pc-linux-gnu/6.1.0 -Wl,-rpath,/fry1/data/shared/software/apps/gcc/6.1.0/lib64 -Wl,-rpath,/fry1/data/shared/software/apps/gcc/6.1.0/lib -Wl,-rpath,/fry1/data/shared/software/libs/mpich/3.1.4/gcc/6.1.0/lib -lmpi -lgcc_s -ldl -Wl,-rpath,/usr/lib -L/usr/lib -Wl,-rpath,/fry1/data/shared/software/libs/libmesh/master/gcc/6.1.0/mpich/3.1.4/petsc/3.6.3/openblas/0.2.14/boost/1.58.0/hdf5/1.8.16/vtk/6.3.0/lib -L/fry1/data/shared/software/libs/libmesh/master/gcc/6.1.0/mpich/3.1.4/petsc/3.6.3/openblas/0.2.14/boost/1.58.0/hdf5/1.8.16/vtk/6.3.0/lib -lmesh_devel
Testing Options:
  CppUnit..................... : yes
    CPPUNIT_VERSION........... : 1.13.2
    CPPUNIT_CPPFLAGS.......... : -I/fry1/data/shared/software/libs/cppunit/1.13.2/gcc/6.1.0/include
    CPPUNIT_LIBS.............. : -L/fry1/data/shared/software/libs/cppunit/1.13.2/gcc/6.1.0/lib -lcppunit -ldl
Optional Features:
   Boost......................... : no
   Antioch....................... : no
   Cantera....................... : no
   Link with GRVY................ : no
   Use GRVY timers............... : no
   Link with MASA................ : no
   Enable gcov code coverage..... : no
-------------------------------------------------------------------------------

Going ahead and merging this. It's troubling, though, that I can get that compilation failure.