Added ClipCGContextToRegion() from Quickdraw.h.
diff --git a/Mac/Modules/cg/CGStubLib.exp b/Mac/Modules/cg/CGStubLib.exp
index 9f4e592..b93dc7c 100755
--- a/Mac/Modules/cg/CGStubLib.exp
+++ b/Mac/Modules/cg/CGStubLib.exp
@@ -57,3 +57,4 @@
 CGContextRelease
 CreateCGContextForPort
 SyncCGContextOriginWithPort
+ClipCGContextToRegion