Start using NSInteger and NSUInteger

These have been introduced in Leopard and default to int and unsigned int.
In 64-bit Snow Leopard they are long and unsigned long.  This caused issues
with the getRectsBeingDrawn message which needs a pointer to a NSInteger
(long on 64-bit!) but we passed in an integer.  Surprisingly this problem
was visible when compiling with -O0 (segfault), but *not* when compiling
with -O1.  Other messages were NSInteger is now needed have also been
adapted.

Since NSInteger and NSUInteger are not available on Tiger, a define
has been added to add typedefs for these when they have not been defined
by the system headers.

gdk/quartz/gdkwindow-quartz.h

@@ -25,6 +25,14 @@
 #import <gdk/quartz/GdkQuartzView.h>
 #import <gdk/quartz/GdkQuartzWindow.h>
 
+/* NSInteger only exists in Leopard and newer.  This check has to be
+ * done after inclusion of the system headers.  If NSInteger has not
+ * been defined, we know for sure that we are on 32-bit.
+ */
+#ifndef NSINTEGER_DEFINED
+typedef int NSInteger;
+typedef unsigned int NSUInteger;
+#endif
 
 G_BEGIN_DECLS