block windows from gl version hell

include/igl/opengl/glfw/Viewer.cpp

@@ -184,7 +184,7 @@ namespace glfw
       printf("Failed to load OpenGL and its extensions\n");
       return(-1);
     }
-    #if defined(DEBUG) || defined(_DEBUG)
+    #if !defined(WIN32) && (defined(DEBUG) || defined(_DEBUG))
       printf("OpenGL Version %d.%d loaded\n", GLVersion.major, GLVersion.minor);
       int major, minor, rev;
       major = glfwGetWindowAttrib(window, GLFW_CONTEXT_VERSION_MAJOR);