fixed constructor on bigint
fixed constructor on bigint

sandan/sqlalchemy,davidfraser/sqlalchemy,robin900/sqlalchemy,inspirehep/sqlalchemy,graingert/sqlalchemy,hsum/sqlalchemy,pdufour/sqlalchemy,davidfraser/sqlalchemy,wfxiang08/sqlalchemy,elelianghh/sqlalchemy,halfcrazy/sqlalchemy,hsum/sqlalchemy,j5int/sqlalchemy,sandan/sqlalchemy,bdupharm/sqlalchemy,WinterNis/sqlalchemy,wujuguang/sqlalchemy,alex/sqlalchemy,276361270/sqlalchemy,Akrog/sqlalchemy,Cito/sqlalchemy,Cito/sqlalchemy,276361270/sqlalchemy,inspirehep/sqlalchemy,olemis/sqlalchemy,zzzeek/sqlalchemy,alex/sqlalchemy,WinterNis/sqlalchemy,alex/sqlalchemy,brianv0/sqlalchemy,halfcrazy/sqlalchemy,dstufft/sqlalchemy,monetate/sqlalchemy,sqlalchemy/sqlalchemy,davidjb/sqlalchemy,j5int/sqlalchemy,bootandy/sqlalchemy,brianv0/sqlalchemy,EvaSDK/sqlalchemy,dstufft/sqlalchemy,bdupharm/sqlalchemy,EvaSDK/sqlalchemy,epa/sqlalchemy,monetate/sqlalchemy,wujuguang/sqlalchemy,ThiefMaster/sqlalchemy,epa/sqlalchemy,pdufour/sqlalchemy,Akrog/sqlalchemy,robin900/sqlalchemy,itkovian/sqlalchemy,ThiefMaster/sqlalchemy,davidjb/sqlalchemy,Cito/sqlalchemy,olemis/sqlalchemy,bootandy/sqlalchemy,itkovian/sqlalchemy,wfxiang08/sqlalchemy,graingert/sqlalchemy,elelianghh/sqlalchemy