Fix/workaround for an autocompletion failure/panic.
Fix/workaround for an autocompletion failure/panic.

mdempsky/gocode,mattn/gocode,lmh008/gocode,louiseGrandjonc/gocode,mattn/gocode,syohex/gocode,louiseGrandjonc/gocode,nsf/gocode,fjl/gocode,kerr-huang/Gocode,fjl/gocode,ghiden/gocode,suncycheng/gocode,lmh008/gocode,kerr-huang/Gocode,nsf/gocode,nsf/gocode,mem/gocode,MerlinDMC/gocode,MerlinDMC/gocode,beni55/gocode,syohex/gocode,syohex/gocode,suncycheng/gocode,toqueteos/LightTable-Go,louiseGrandjonc/gocode,mattn/gocode,mdempsky/gocode,thousandhigh/gocode,mem/gocode,kerr-huang/Gocode,suncycheng/gocode,artnez/gocode,fjl/gocode,toqueteos/LightTable-Go,lmh008/gocode,kerr-huang/Gocode,ghiden/gocode,artnez/gocode,thousandhigh/gocode,MerlinDMC/gocode,TheBB/gocode,mem/gocode,lmh008/gocode,thousandhigh/gocode,ghiden/gocode,MerlinDMC/gocode,artnez/gocode,TheBB/gocode,mattn/gocode,beni55/gocode,beni55/gocode,mdempsky/gocode,TheBB/gocode,fjl/gocode,TheBB/gocode,mem/gocode,suncycheng/gocode,louiseGrandjonc/gocode,syohex/gocode,thousandhigh/gocode,ghiden/gocode,artnez/gocode,beni55/gocode,nsf/gocode