[gtk-mac-integration] Add protocol designator to GtkApplicationDelegate declaration.

[John Ralls <jralls src gnome org>]

commit 52e3e1bd00d4a1fc3ecd2eba356fd4dd78d2e2e9
Author: John Ralls <jralls ceridwen us>
Date:   Sat Dec 27 16:38:25 2014 -0800

    Add protocol designator to GtkApplicationDelegate declaration.
    
    Hoped it would silence the incompatible type warnings, which it didn't,
    but it seems the right thing to do anyway.

 src/GtkApplicationDelegate.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/GtkApplicationDelegate.h b/src/GtkApplicationDelegate.h
index 8fc01a6..8d62732 100644
--- a/src/GtkApplicationDelegate.h
+++ b/src/GtkApplicationDelegate.h
@@ -22,6 +22,6 @@
 
 #import <Cocoa/Cocoa.h>
 
- interface GtkApplicationDelegate : NSObject {}
+ interface GtkApplicationDelegate : NSObject <NSApplicationDelegate> {}
 @end