BUG: fix for bug#3646 GLUT not Glut for framework name

Modules/FindGLUT.cmake

@@ -45,7 +45,7 @@ ELSE (WIN32)
       /System/Library/Frameworks/GLUT.framework/Versions/A/Headers
       ${OPENGL_LIBRARY_DIR}
     )
-    SET(GLUT_glut_LIBRARY "-framework Glut" CACHE STRING "GLUT library for OSX") 
+    SET(GLUT_glut_LIBRARY "-framework GLUT" CACHE STRING "GLUT library for OSX") 
     SET(GLUT_cocoa_LIBRARY "-framework Cocoa" CACHE STRING "Cocoa framework for OSX")
   ELSE (APPLE)