Fixed: CPImage -size returned internal object ref
Fixed: CPImage -size returned internal object ref

Previously, CPImage -size returned a reference to the internal _size object, which allowed the caller to directly change _size. In Cocoa a copy of the size is returned.

This commit returns a copy of _size to ensure no unwanted side effects.

tancred/cappuccino,daboe01/cappuccino,zittix/cappuccino,krodelin/cappuccino,daboe01/cappuccino,primalmotion/cappuccino,Dogild/cappuccino,mrcarlberg/cappuccino,krodelin/cappuccino,tancred/cappuccino,cappuccino/cappuccino,daboe01/cappuccino,enquora/cappuccino,tancred/cappuccino,FrankReh/cappuccino,krodelin/cappuccino,krodelin/cappuccino,mrcarlberg/cappuccino,FrankReh/cappuccino,Rosch/cappuccino,rgv151/cappuccino,daboe01/cappuccino,enquora/cappuccino,Dogild/cappuccino,enquora/cappuccino,mrcarlberg/cappuccino,rgv151/cappuccino,rgv151/cappuccino,tancred/cappuccino,cappuccino/cappuccino,zittix/cappuccino,rgv151/cappuccino,Rosch/cappuccino,primalmotion/cappuccino,zittix/cappuccino,FrankReh/cappuccino,Rosch/cappuccino,mrcarlberg/cappuccino,enquora/cappuccino,mrcarlberg/cappuccino,Dogild/cappuccino,mrcarlberg/cappuccino,krodelin/cappuccino,tancred/cappuccino,primalmotion/cappuccino,Rosch/cappuccino,Dogild/cappuccino,primalmotion/cappuccino,Rosch/cappuccino,cappuccino/cappuccino,zittix/cappuccino,primalmotion/cappuccino,FrankReh/cappuccino,mrcarlberg/cappuccino,enquora/cappuccino,daboe01/cappuccino,rgv151/cappuccino,zittix/cappuccino,cappuccino/cappuccino,cappuccino/cappuccino,primalmotion/cappuccino,FrankReh/cappuccino,FrankReh/cappuccino,daboe01/cappuccino,FrankReh/cappuccino,Rosch/cappuccino,enquora/cappuccino,tancred/cappuccino,rgv151/cappuccino,enquora/cappuccino,Rosch/cappuccino,daboe01/cappuccino,zittix/cappuccino,primalmotion/cappuccino,zittix/cappuccino,krodelin/cappuccino,mrcarlberg/cappuccino,Dogild/cappuccino,rgv151/cappuccino,Dogild/cappuccino,krodelin/cappuccino,Dogild/cappuccino,FrankReh/cappuccino,cappuccino/cappuccino,cappuccino/cappuccino