create_shared shouldn't copy the shared window
create_shared shouldn't copy the shared window

bjz/glfw-rs,mneumann/glfw-rs,derekdreery/glfw-rs,tomaka/glfw-rs,larsbergstrom/glfw-rs,erickt/glfw-rs,servo/glfw-rs,bvssvni/glfw-rs,brson/glfw-rs,jhasse/glfw-rs,PistonDevelopers/glfw-rs,derekdreery/glfw-rs,nstoddard/glfw-rs,rlane/glfw-rs