Fixed incorrect size return in osx stage if stage resizable by user.
Fixed incorrect size return in osx stage if stage resizable by user.

For some reasons width&height was equal to 1 if flag user-resizable was true.

rkudiyarov/clutter_osx,rkudiyarov/clutter_osx,rkudiyarov/clutter_osx,rkudiyarov/clutter_osx