added glGetActiveUniform_func
diff --git a/progs/util/extfuncs.h b/progs/util/extfuncs.h
index 88a6ae9..cf6b29d 100644
--- a/progs/util/extfuncs.h
+++ b/progs/util/extfuncs.h
@@ -12,6 +12,7 @@
 static PFNGLDELETEPROGRAMPROC glDeleteProgram_func = NULL;
 static PFNGLDELETESHADERPROC glDeleteShader_func = NULL;
 static PFNGLGETACTIVEATTRIBPROC glGetActiveAttrib_func = NULL;
+static PFNGLGETACTIVEUNIFORMPROC glGetActiveUniform_func = NULL;
 static PFNGLGETATTACHEDSHADERSPROC glGetAttachedShaders_func = NULL;
 static PFNGLGETATTRIBLOCATIONPROC glGetAttribLocation_func = NULL;
 static PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog_func = NULL;
@@ -91,6 +92,7 @@
    glDeleteProgram_func = (PFNGLDELETEPROGRAMPROC) glutGetProcAddress("glDeleteProgram");
    glDeleteShader_func = (PFNGLDELETESHADERPROC) glutGetProcAddress("glDeleteShader");
    glGetActiveAttrib_func = (PFNGLGETACTIVEATTRIBPROC) glutGetProcAddress("glGetActiveAttrib");
+   glGetActiveUniform_func = (PFNGLGETACTIVEUNIFORMPROC) glutGetProcAddress("glGetActiveUniform");
    glGetAttachedShaders_func = (PFNGLGETATTACHEDSHADERSPROC) glutGetProcAddress("glGetAttachedShaders");
    glGetAttribLocation_func = (PFNGLGETATTRIBLOCATIONPROC) glutGetProcAddress("glGetAttribLocation");
    glGetProgramInfoLog_func = (PFNGLGETPROGRAMINFOLOGPROC) glutGetProcAddress("glGetProgramInfoLog");