Fix compile warning on qtblend transition
Fix compile warning on qtblend transition

siddharudh/mlt,siddharudh/mlt,j-b-m/mlt,j-b-m/mlt,j-b-m/mlt,mltframework/mlt,j-b-m/mlt,j-b-m/mlt,j-b-m/mlt,j-b-m/mlt,mltframework/mlt,mltframework/mlt,mltframework/mlt,siddharudh/mlt,mltframework/mlt,j-b-m/mlt,mltframework/mlt,siddharudh/mlt,siddharudh/mlt,mltframework/mlt,siddharudh/mlt,siddharudh/mlt,mltframework/mlt,j-b-m/mlt,mltframework/mlt,siddharudh/mlt,j-b-m/mlt,siddharudh/mlt,mltframework/mlt