 * stroke style  * FIX: invalid arguments for CGBitmapContextCreate
 * stroke style
 * FIX: invalid arguments for CGBitmapContextCreate


git-svn-id: 138633440ca78e05a0a5a1070c9e67f1accb426a@1932 c432a1ab-ec09-0410-8e5f-fb625be92370

gary109/iphone_opencv_test,niw/iphone_opencv_test,gary109/iphone_opencv_test,gary109/iphone_opencv_test,niw/iphone_opencv_test,niw/iphone_opencv_test