Pixel shaders should be disabled when old GPU is detected

[auriamg]

Now it simply doesn't start.

FileManager: Data files will be fetched from: ''
FileManager: User directory is 'C:\Users\deve\AppData\Roaming/supertuxkart/'.
FileManager: Addons files will be stored in 'C:\Users\deve\AppData\Roaming/supertuxkart/addons/'.
FileManager: Screenshots will be stored in 'C:\Users\deve\AppData\Roaming/supertuxkart/screenshots/'.
translation: GetLocaleInfo langname returns 'pl'.
translation: GetLocaleInfo tryname returns 'PL'.
translation: Env var LANGUAGE = 'pl_PL'.
translation: Language 'Polish (Poland)'.
irr_driver: !!!!! Performance warning: Irrlicht compiled with debug mode.!!!!!

irr_driver: !!!!! This can have a significant performance impact !!!!!

irr_driver: GLSL supported.
Temp Logger: Level 3: GL_INVALID_ENUM

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_ENUM

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_ENUM

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_ENUM

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_ENUM

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_ENUM

Temp Logger: Level 3: GL_INVALID_ENUM

Temp Logger: Level 3: GL_INVALID_ENUM

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GL_INVALID_OPERATION

Temp Logger: Level 3: GLSL shader failed to compile

Temp Logger: Level 3: ERROR: 0:1: '' : Version number not supported by GL2
ERROR: 0:27: ']' : syntax error parse error

Temp Logger: Level 3: GLSL shader failed to compile

Temp Logger: Level 3: WARNING: 0:4: extension 'GL_ARB_shader_texture_lod' is not supported
ERROR: 0:17: 'texture2DLod' : no matching overloaded function found
ERROR: 0:17: 'return' : function return is not matching type:
ERROR: 0:73: 'texture2DLod' : no matching overloaded function found
ERROR: 0:73: 'ra' : field selection requires structure, vector, or matrix on left hand side
ERROR: 0:73: 'return' : function return is not matching type:
ERROR: 0:89: 'texture2DLod' : no matching overloaded function found
ERROR: 0:89: 'r' : field selection requires structure, vector, or matrix on left hand side
ERROR: 0:90: 'texture2DLod' : no matching overloaded function found
ERROR: 0:90: 'r' : field selection requires structure, vector, or matrix on left hand side
ERROR: 0:104: 'texture2DLod' : no matching overloaded function found
ERROR: 0:104: 'g' : field selection requires structure, vector, or matrix on left hand side
ERROR: 0:105: 'texture2DLod' : no matching overloaded function found
ERROR: 0:105: 'g' : field selection requires structure, vector, or matrix on left hand side

Temp Logger: Level 3: GLSL shader failed to compile

Temp Logger: Level 3: ERROR: 0:1: '' : Version number not supported by GL2
ERROR: 0:12: '/' : wrong operand types no operation '/' exists that takes a left-hand operand of type 'const float' and a right operand of type 'const int' (or there is no acceptable conversion)
ERROR: 0:18: ']' : syntax error parse error

shaders: Shader MLAA_BLEND2 failed to load. Update your drivers, if the issue persists, report a bug to us.

Migrated-From: https://sourceforge.net/apps/trac/supertuxkart/t/ticket/1130