Fix some Xcode 11 warnings

Limelight/Input/ControllerSupport.m

@@ -194,6 +194,9 @@
     [_controllerStreamLock unlock];
 }
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+
 -(void) unregisterControllerCallbacks:(GCController*) controller
 {
     if (controller != NULL) {
@@ -428,6 +431,8 @@
     return controller.extendedGamepad != nil || controller.gamepad != nil;
 }
 
+#pragma clang diagnostic pop
+
 +(int) getGamepadCount {
     int count = 0;