Error "'asprintf' was not declared in this scope" when building with MinGW-W64

[jdx-gh]

Here is the patch:

diff --git a/src/bootstrap/SupportTree.cpp b/src/bootstrap/SupportTree.cpp
index 388744a..e028b1d 100644
--- a/src/bootstrap/SupportTree.cpp
+++ b/src/bootstrap/SupportTree.cpp
@@ -1,3 +1,10 @@
+#ifdef __MINGW32__
+// for asprintf
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#endif
+
 #include "SupportTree.hpp"
 
 using namespace std;
diff --git a/src/io/NewickStream.cpp b/src/io/NewickStream.cpp
index 9b7eb34..b06a528 100644
--- a/src/io/NewickStream.cpp
+++ b/src/io/NewickStream.cpp
@@ -1,3 +1,10 @@
+#ifdef __MINGW32__
+// for asprintf
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#endif
+
 #include "file_io.hpp"
 
 using namespace std;