Re: Modification to glr.c to report parse errors properly

[Akim Demaille]

 Paul> The input.at test shows that a GLR parser running on a normal LALR
 Paul> grammar and given an erroneous input that causes an unrecoverable
 Paul> parse error can fail to report the error.  This was because the
 Paul> yyerrflag indicator on the parsing stack was only being set on failure
 Paul> only under certain conditions, whereas it should always be set.  I
 Paul> have checked in the patch below.

Thanks Paul!

I don't know if you saw my other notes, but I also wonder why there is
a sole yyerror call which is not triggered by yyreportParseError. Is
it intended?