Fix macos build

3rdparty/SPMediaKeyTap/SPInvocationGrabbing/gistfile4.m

@@ -0,0 +1,12 @@
+@interface MyClass : NSObject
+-(BOOL)areTheNewViewersGoneYet:(Duck*)duck;
+@end
+...
+MyClass *myInstance = [[MyClass alloc] init];
+id invocationGrabber = [[[SPInvocationGrabber alloc] initWithTarget:myInstance] autorelease];
+
+
+[invocationGrabber areTheNewViewersGoneYet:[Duck yellowDuck]]; // line 9
+
+
+NSInvocation *invocationForAreTheNewViewersGoneYet = [invocationGrabber invocation];