[Gtkradiant] [Bug 1012] hiding unused textures may partially hide last ones

[gtkradiant@zerowing.idsoftware.com]

http://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=1012

wjoseph@europe.ea.com changed:

           What    |Removed                     |Added
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         AssignedTo|ttimo@idsoftware.com        |wjoseph@europe.ea.com
             Status|ASSIGNED                    |NEW