Update compiler.py
Update compiler.py

Moved initialization into else block
Conflicts:
	lib/sqlalchemy/sql/compiler.py

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