OpenGL ES compilation fixes.

src/Contexts/ExtensionWrangler.cpp

@@ -31,6 +31,8 @@ void ExtensionWrangler::initialize(ExperimentalFeatures experimentalFeatures) {
         Error() << "ExtensionWrangler: cannot initialize GLEW:" << glewGetErrorString(err);
         exit(1);
     }
+    #else
+    static_cast<void>(experimentalFeatures); /* Shut up about unused parameter */
     #endif
 }
 

src/Framebuffer.h

@@ -1112,7 +1112,9 @@ class MAGNUM_EXPORT Framebuffer {
 };
 
 CORRADE_ENUMSET_OPERATORS(Framebuffer::ClearMask)
+#ifndef MAGNUM_TARGET_GLES
 CORRADE_ENUMSET_OPERATORS(Framebuffer::BlitMask)
+#endif
 
 }