Fix Objective-C 2.0 error with gcc-4.0#1272

Merged

efiring merged 2 commits intomatplotlib:v1.2.xfrom

dmcdougall:mac_objc1

Sep 18, 2012

Commits on Sep 17, 2012

Fix Objective-C 2.0 error with gcc-4.0
dmcdougall
committed

Commits on Sep 18, 2012

Use NSEnumerator instead of objectAtIndex
dmcdougall
committed