Gramlib: Fixes #9358 (ensuring that the loc function has something to compute).
Gramlib: Fixes #9358 (ensuring that the loc function has something to compute).

ppedrot/coq,Zimmi48/coq,Zimmi48/coq,coq/coq,Zimmi48/coq,Zimmi48/coq,ejgallego/coq,JasonGross/coq,ejgallego/coq,ejgallego/coq,gares/coq,ppedrot/coq,Matafou/coq,gares/coq,silene/coq,SkySkimmer/coq,gares/coq,Matafou/coq,coq/coq,JasonGross/coq,coq/coq,gares/coq,gares/coq,coq/coq,ppedrot/coq,SkySkimmer/coq,ppedrot/coq,JasonGross/coq,JasonGross/coq,ejgallego/coq,silene/coq,silene/coq,SkySkimmer/coq,Matafou/coq,SkySkimmer/coq,ppedrot/coq