Fix GLEW->GLU dependency regression

Add the GLEW_NO_GLU define everywhere needed to prevent the unwanted
header dependency.

Author: slipher

src/engine/renderer/GLMemory.h

@@ -37,7 +37,12 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define GLMEMORY_H
 
 #include "common/Common.h"
-#include "GL/glew.h"
+
+#ifndef GLEW_NO_GLU
+#define GLEW_NO_GLU
+#endif
+#include <GL/glew.h>
+
 #include "tr_local.h"
 #include "BufferBind.h"
 

src/engine/renderer/tr_local.h

@@ -24,7 +24,9 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 #ifndef TR_LOCAL_H
 #define TR_LOCAL_H
 
+#ifndef GLEW_NO_GLU
 #define GLEW_NO_GLU
+#endif
 #include <GL/glew.h>
 
 #include "common/FileSystem.h"