Fix order_by on empty sequences.
Fix order_by on empty sequences.

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