when using Cocoa backend don't look for external jpeg and png libs in (that might use X11).
when using Cocoa backend don't look for external jpeg and png libs in
(that might use X11).


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@45757 27541ba8-7e3a-0410-8455-c3a389f83636

bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT