Conditional glad include

Author: Shivansps

code/ktxutils/ktxutils.cpp

@@ -1,7 +1,6 @@
 #include "ktxutils.h"
 #include "bmpman/bmpman.h"
 #include "cfile/cfile.h"
-#include <glad/glad.h>
 //KTX1 Spec definition https://registry.khronos.org/KTX/specs/1.0/ktxspec.v1.html
 //ETC2 formats spec https://registry.khronos.org/DataFormat/specs/1.4/dataformat.1.4.inline.html#ETC2
 

code/ktxutils/ktxutils.h

@@ -1,7 +1,9 @@
 #pragma once
 #include "globalincs/pstypes.h"
 #include "cfile/cfile.h"
+#ifdef WITH_OPENGL
 #include <glad/glad.h>
+#endif
 
 // ETC2 types
 #define KTX_ETC2_RGB		101