jpegdec: handle comment marker and continue scan after current filed
jpegdec: handle comment marker and continue scan after current filed

simple bypass COM (0xfe) field like APPn marker
a second scan starts after end of current field, not after current marker.

xuguangxin/libyami,pombreda/libyami,bluceldg/libyami,xuguangxin/libyami,pombreda/libyami,zhongcong/libyami,dhutching/libyami,chivakker/libyami,mdnavare/libyami,zhongcong/libyami,halleyzhao/libyami,bluceldg/libyami,yizhouwei/libyami,01org/libyami,changzhix/libyami-1,sbianti/libyami,UIKit0/libyami,zhaobob/libyami,sbianti/libyami,mdnavare/libyami,seanvk/libyami,mdnavare/libyami,luokunrock/libyami,andyLiuChina/libyami,andyLiuChina/libyami,sbianti/libyami,wlin70/libyami,uartie/libyami,lizhong1008/libyami,yizhouwei/libyami,TangXinT/libyami,lizhong1008/libyami,UIKit0/libyami,mdnavare/libyami,BtbN/libyami,TangXinT/libyami,ratin3/libyami,pombreda/libyami,BtbN/libyami,changzhix/libyami-1,chivakker/libyami,dspmeng/libyami,lizhong1008/libyami,tiagovignatti/libyami,ratin3/libyami,YuJiankang/libyami,tiagovignatti/libyami,andyLiuChina/libyami,uartie/libyami,01org/libyami,01org/libyami,luokunrock/libyami,lubing521/libyami,yizhouwei/libyami,clearlylin/libyami,clearlylin/libyami,halleyzhao/libyami,stripes416/libyami,sbianti/libyami,halleyzhao/libyami,UIKit0/libyami,uartie/libyami,skibey/libyami,skibey/libyami,BtbN/libyami,andyLiuChina/libyami,lubing521/libyami,tiagovignatti/libyami,stripes416/libyami,YuJiankang/libyami,clearlylin/libyami,zhongcong/libyami,skibey/libyami,bluceldg/libyami,zhaobob/libyami,changzhix/libyami-1,ratin3/libyami,zhongcong/libyami,xuguangxin/libyami,wlin70/libyami,wlin70/libyami,ratin3/libyami,dhutching/libyami,YuJiankang/libyami,xuguangxin/libyami,luokunrock/libyami,pombreda/libyami,dhutching/libyami,halleyzhao/libyami,bluceldg/libyami,seanvk/libyami,TangXinT/libyami,lubing521/libyami,BtbN/libyami,dspmeng/libyami,stripes416/libyami,seanvk/libyami,wlin70/libyami,dspmeng/libyami,chivakker/libyami,zhaobob/libyami,luokunrock/libyami