Fix a warning on Windows

5e4b49f65f introduced a warning, silence it as it's in spidermonkey and
only leaks while on vs2017.

Signed-off-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>

source/renderer/backend/IDevice.h

@@ -24,7 +24,15 @@
 #include "renderer/backend/ITexture.h"
 
 #include <cstdint>
+#if MSC_VERSION
+# pragma warning(push, 1)
+# pragma warning(disable: 4068)
+# pragma warning(disable: 4100)
+#endif
 #include <js/TypeDecls.h>
+#if MSC_VERSION
+# pragma warning(pop)
+#endif
 #include <memory>
 #include <string>
 #include <vector>