rcparse.y: unary negation of unsigned type

[amores perros]

rcparse.y

(downloaded today in binutils-2.13.2.1)

circa line 1606

        | '-' sizednumexpr %prec NEG
          {
            $$.val = - $2.val;


Isn't that .val making it an unsigned type, in which case the
unary minus does... what ?

I'm thinking it ought to be this (but I am not very clear on
signed/unsigned issues!)


            $$.val = (unsigned long)-(signed long)$2.val;


Cordially,

Perry


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