Fix keycode problem on OSX

platform/osx/os_osx.mm

@@ -934,7 +934,7 @@ static int remapKey(unsigned int key) {
 
 	CFDataRef layoutData = (CFDataRef)TISGetInputSourceProperty(currentKeyboard, kTISPropertyUnicodeKeyLayoutData);
 	if (!layoutData)
-		return 0;
+		return translateKey(key);
 
 	const UCKeyboardLayout *keyboardLayout = (const UCKeyboardLayout *)CFDataGetBytePtr(layoutData);