Fix bug in redis task queue
Fix bug in redis task queue

SpaceAppsXploration/grab,huiyi1990/grab,pombredanne/grab-1,DDShadoww/grab,giserh/grab,alihalabyah/grab,maurobaraldi/grab,kevinlondon/grab,istinspring/grab,raybuhr/grab,pombredanne/grab-1,liorvh/grab,codevlabs/grab,alihalabyah/grab,istinspring/grab,codevlabs/grab,lorien/grab,subeax/grab,subeax/grab,giserh/grab,maurobaraldi/grab,SpaceAppsXploration/grab,subeax/grab,lorien/grab,liorvh/grab,raybuhr/grab,DDShadoww/grab,shaunstanislaus/grab,shaunstanislaus/grab,kevinlondon/grab,huiyi1990/grab