fix alpha on draw function
fix alpha on draw function

nils-werner/SimpleCV,jayrambhia/SimpleCV2,nils-werner/SimpleCV,jlegendary/SimpleCV,sightmachine/SimpleCV2,jayrambhia/SimpleCV2,tpltnt/SimpleCV,gskielian/SimpleCV,nils-werner/SimpleCV,beni55/SimpleCV,gskielian/SimpleCV,onaclovtech/SimpleCV,beni55/SimpleCV,gskielian/SimpleCV,hurdlea/SimpleCV,jyt109/SimpleCV,beni55/SimpleCV,nikhilgk/SimpleCV,nikhilgk/SimpleCV,nils-werner/SimpleCV,sightmachine/SimpleCV,nikhilgk/SimpleCV,beni55/SimpleCV,hurdlea/SimpleCV,jyt109/SimpleCV,jlegendary/SimpleCV,sightmachine/SimpleCV,jyt109/SimpleCV,tpltnt/SimpleCV,sightmachine/SimpleCV2,hurdlea/SimpleCV,hurdlea/SimpleCV,sightmachine/SimpleCV,tpltnt/SimpleCV,hayd/SimpleCV,nikhilgk/SimpleCV,onaclovtech/SimpleCV,sightmachine/SimpleCV,jlegendary/SimpleCV,nikhilgk/SimpleCV,hayd/SimpleCV,hayd/SimpleCV,gskielian/SimpleCV,jayrambhia/SimpleCV2,sightmachine/SimpleCV2,nils-werner/SimpleCV,sightmachine/SimpleCV,onaclovtech/SimpleCV,onaclovtech/SimpleCV,jlegendary/SimpleCV,sightmachine/SimpleCV2,hayd/SimpleCV,jyt109/SimpleCV,jlegendary/SimpleCV,hayd/SimpleCV,tpltnt/SimpleCV,beni55/SimpleCV,tpltnt/SimpleCV,jayrambhia/SimpleCV2,hurdlea/SimpleCV,jyt109/SimpleCV,gskielian/SimpleCV,onaclovtech/SimpleCV