codeiter: simplify is_a_use_stmt a little
codeiter: simplify is_a_use_stmt a little

kbknapp/racer,MattWis/racer,MattWis/racer,BonsaiDen/racer,dleslie/racer,alkama/racer,drewet/racer,sthapaun/racer,kbknapp/racer,sthapaun/racer,jaxx/racer,syhkiller/racer,pmarcelll/racer,syhkiller/racer,racer-rust/racer,drewet/racer,hotpxl/racer,phildawes/racer,sliz1/racer,birkenfeld/racer,Wilfred/racer,BonsaiDen/racer