Fixing a little location bug with recursive binders.
Fixing a little location bug with recursive binders.

Note that localisation cannot be perfect anyways, as in the following
example, where there is no way to highlight in the original input a
syntactically stand-alone subterm where the error occurs.

> Check forall (y:nat) (x:=0), y.
>       ^^^^^^^^^^^^^^^^^^^^^^^^
Error: In environment
y : nat
The term "let x := 0 in y" has type "nat" which should be Set, Prop or Type.

coq/coq,ppedrot/coq,letouzey/coq-wip,SkySkimmer/coq,maximedenes/coq,ejgallego/coq,SkySkimmer/coq,silene/coq,Zimmi48/coq,gares/coq,Zimmi48/coq,Matafou/coq,maximedenes/coq,ppedrot/coq,Matafou/coq,silene/coq,silene/coq,maximedenes/coq,coq/coq,gares/coq,coq/coq,JasonGross/coq,ppedrot/coq,letouzey/coq-wip,Matafou/coq,gares/coq,maximedenes/coq,JasonGross/coq,SkySkimmer/coq,coq/coq,JasonGross/coq,gares/coq,ppedrot/coq,ejgallego/coq,Zimmi48/coq,JasonGross/coq,maximedenes/coq,letouzey/coq-wip,Zimmi48/coq,gares/coq,letouzey/coq-wip,ppedrot/coq,SkySkimmer/coq,ejgallego/coq,ejgallego/coq,letouzey/coq-wip