Fix #854
Fix #854

I don't know the exact reason why this doesn't occur problem in newer Xcodes.
This error was generated because ARC couldn't find the declaration of the method in header (NSView).
ARC had required declaration for methods. It seems it is acceptable after Xcode6.4...

dengcqw/XVim_x,ishkawa/XVim,XVimProject/XVim,squarefrog/XVim,tanxxjun321/XVim,brucehappy/XVim,antmd/XVim,gecko655/XVim,tanxxjun321/XVim,XVimProject/XVim,pebble8888/XVim,hyperspacemark/XVim,hyperspacemark/XVim,raimon49/XVim,hyperspacemark/XVim,antmd/XVim,squarefrog/XVim,teemobean/XVim,pebble8888/XVim,hyperspacemark/XVim,pebble8888/XVim,raimon49/XVim,N4tr0n/XVim,tanxxjun321/XVim,ishkawa/XVim,dengcqw/XVim_x,N4tr0n/XVim,gecko655/XVim,teemobean/XVim,XVimProject/XVim,pebble8888/XVim,raimon49/XVim,raimon49/XVim,gecko655/XVim,gecko655/XVim,N4tr0n/XVim,ishkawa/XVim,antmd/XVim,dengcqw/XVim_x,squarefrog/XVim,teemobean/XVim,ishkawa/XVim,brucehappy/XVim,squarefrog/XVim,tanxxjun321/XVim,teemobean/XVim,XVimProject/XVim,antmd/XVim,brucehappy/XVim,brucehappy/XVim,dengcqw/XVim_x,N4tr0n/XVim