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Fix bug in decl

decl was returning NULL in the case of empty declarations, and in
this case it means no more declarations were scanned. This patch
force to decl() to follow scanning until it find a correct
correct declaration, or a non declaration.

--- a/decl.c

+++ b/decl.c

@@ -216,25 +216,22 @@

 decl(void)

 {

 	register struct ctype *tp;

-	register struct node *np = NULL;

+repeat:

 	if (!(tp = spec())) {

 		if (curctx != CTX_OUTER || yytoken != IDEN)

-			goto end;

+			return NULL;

 		tp = newctype();

 		tp->type = INT;

 		warning_error(options.implicit,

 		              "data definition has no type or storage class");

-	}

-	if (accept(';')) {

+	} else if (accept(';')) {

 		warning_error(options.useless,

 			      "useless type name in empty declaration");

 		delctype(tp);

-	} else {

-		np = listdcl(tp);

+		goto repeat;

 	}

-

-end:	return np;

+	return listdcl(tp);

 }

 void