Added ctx != NULL assertion in read_t::unshard.
Added ctx != NULL assertion in read_t::unshard.

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nkodenis/rethinkdb,AntouanK/rethinkdb,lenstr/rethinkdb,bchavez/rethinkdb,grandquista/rethinkdb,lenstr/rethinkdb,wujf/rethinkdb,niieani/rethinkdb,sebadiaz/rethinkdb,wojons/rethinkdb,sebadiaz/rethinkdb,yaolinz/rethinkdb,alash3al/rethinkdb,scripni/rethinkdb,wkennington/rethinkdb,tempbottle/rethinkdb,4talesa/rethinkdb,catroot/rethinkdb,KSanthanam/rethinkdb,niieani/rethinkdb,matthaywardwebdesign/rethinkdb,pap/rethinkdb,mquandalle/rethinkdb,yaolinz/rethinkdb,elkingtonmcb/rethinkdb,robertjpayne/rethinkdb,4talesa/rethinkdb,urandu/rethinkdb,wojons/rethinkdb,lenstr/rethinkdb,sebadiaz/rethinkdb,captainpete/rethinkdb,robertjpayne/rethinkdb,tempbottle/rethinkdb,losywee/rethinkdb,ayumilong/rethinkdb,greyhwndz/rethinkdb,sontek/rethinkdb,niieani/rethinkdb,mbroadst/rethinkdb,RubenKelevra/rethinkdb,JackieXie168/rethinkdb,yaolinz/rethinkdb,gdi2290/rethinkdb,Wilbeibi/rethinkdb,gavioto/rethinkdb,grandquista/rethinkdb,wujf/rethinkdb,urandu/rethinkdb,AntouanK/rethinkdb,urandu/rethinkdb,victorbriz/rethinkdb,bpradipt/rethinkdb,bchavez/rethinkdb,pap/rethinkdb,sontek/rethinkdb,spblightadv/rethinkdb,yaolinz/rethinkdb,catroot/rethinkdb,jmptrader/rethinkdb,ayumilong/rethinkdb,gdi2290/rethinkdb,ajose01/rethinkdb,Qinusty/rethinkdb,marshall007/rethinkdb,jesseditson/rethinkdb,catroot/rethinkdb,alash3al/rethinkdb,mquandalle/rethinkdb,eliangidoni/rethinkdb,jmptrader/rethinkdb,greyhwndz/rethinkdb,marshall007/rethinkdb,grandquista/rethinkdb,matthaywardwebdesign/rethinkdb,robertjpayne/rethinkdb,AntouanK/rethinkdb,mquandalle/rethinkdb,matthaywardwebdesign/rethinkdb,eliangidoni/rethinkdb,gavioto/rethinkdb,lenstr/rethinkdb,mbroadst/rethinkdb,jesseditson/rethinkdb,yaolinz/rethinkdb,wujf/rethinkdb,urandu/rethinkdb,gavioto/rethinkdb,jmptrader/rethinkdb,grandquista/rethinkdb,jmptrader/rethinkdb,greyhwndz/rethinkdb,Qinusty/rethinkdb,bpradipt/rethinkdb,bpradipt/rethinkdb,dparnell/rethinkdb,dparnell/rethinkdb,robertjpayne/rethinkdb,yaolinz/rethinkdb,sontek/rethinkdb,bpradipt/rethinkdb,yaolinz/rethinkdb,losywee/rethinkdb,sontek/rethinkdb,spblightadv/rethinkdb,ayumilong/rethinkdb,jmptrader/rethinkdb,gdi2290/rethinkdb,robertjpayne/rethinkdb,dparnell/rethinkdb,alash3al/rethinkdb,jmptrader/rethinkdb,JackieXie168/rethinkdb,urandu/rethinkdb,marshall007/rethinkdb,scripni/rethinkdb,elkingtonmcb/rethinkdb,ayumilong/rethinkdb,KSanthanam/rethinkdb,ajose01/rethinkdb,victorbriz/rethinkdb,yakovenkodenis/rethinkdb,wkennington/rethinkdb,Wilbeibi/rethinkdb,sbusso/rethinkdb,Qinusty/rethinkdb,bchavez/rethinkdb,4talesa/rethinkdb,mbroadst/rethinkdb,sontek/rethinkdb,Qinusty/rethinkdb,matthaywardwebdesign/rethinkdb