Make sure we hide the GL enums whre they don't exist.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2957 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/COpenGLSLMaterialRenderer.cpp

@@ -225,16 +225,16 @@ bool COpenGLSLMaterialRenderer::createShader(GLenum shaderType, const char* shad
 
 	Driver->extGlAttachObject(Program, shaderHandle);
 
+#if defined(GL_ARB_geometry_shader4) || defined(GL_EXT_geometry_shader4) || defined(GL_NV_geometry_shader4)
 	if (shaderType==GL_GEOMETRY_SHADER_EXT && Driver->queryFeature(EVDF_GEOMETRY_SHADER))
 	{
-#if defined(GL_ARB_geometry_shader4) || defined(GL_EXT_geometry_shader4) || defined(GL_NV_geometry_shader4)
 		Driver->extGlProgramParameteri(Program, GL_GEOMETRY_INPUT_TYPE_EXT, GL_TRIANGLES);
 		Driver->extGlProgramParameteri(Program, GL_GEOMETRY_OUTPUT_TYPE_EXT, GL_TRIANGLE_STRIP);
 		Driver->extGlProgramParameteri(Program, GL_GEOMETRY_VERTICES_OUT_EXT, Driver->MaxGeometryVerticesOut);
 #elif defined(GL_NV_geometry_program4)
 		Driver->extGlProgramVertexLimit(GL_GEOMETRY_PROGRAM_NV, Driver->MaxGeometryVerticesOut);
-#endif
 	}
+#endif
 
 	return true;
 }