Small tweak for 64-bit compatibility on Mac.

build/macosx/platform_specific_code/juce_mac_NSViewComponentPeer.mm

@@ -1321,7 +1321,7 @@ void NSViewComponentPeer::drawRect (NSRect r)
     context.setOrigin (originX, originY);
 
     const NSRect* rects = 0;
-    int numRects = 0;
+    NSInteger numRects = 0;
     [view getRectsBeingDrawn: &rects count: &numRects];
 
     RectangleList clip;

juce_amalgamated.cpp

@@ -267136,7 +267136,8 @@ void NSViewComponentPeer::drawRect (NSRect r)
     context.setOrigin (originX, originY);
 
     const NSRect* rects = 0;
-    int numRects = 0;
+    NSInteger numRects = 0;
+
     [view getRectsBeingDrawn: &rects count: &numRects];
 
     RectangleList clip;