iOS: Fix cloning or drawing a portion of an image. Fixes #179
iOS: Fix cloning or drawing a portion of an image. Fixes #179

bbqchickenrobot/Eto-1,PowerOfCode/Eto,l8s/Eto,PowerOfCode/Eto,bbqchickenrobot/Eto-1,bbqchickenrobot/Eto-1,PowerOfCode/Eto,l8s/Eto,l8s/Eto