Fixed NSImage leak. Added check for retain cycle. Removed empty initializer.
Fixed NSImage leak. Added check for retain cycle. Removed empty initializer.

thx0701/HexFiend,pandazheng/HexFiend,kedh/HexFiend,kedh/HexFiend,pandazheng/HexFiend,thx0701/HexFiend,kedh/HexFiend,pandazheng/HexFiend,saulogt/HexFiend,thx0701/HexFiend,saulogt/HexFiend,saulogt/HexFiend,pandazheng/HexFiend,thx0701/HexFiend,kedh/HexFiend,saulogt/HexFiend