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[cc1] handle correctly arrays in address()

When a address operator is applied to an array then we do not
want to decay the array, because we want a pointer to the array
itself, not to the first element of the array. In the same way,
an array is not a lvalue, but it is legal to take a pointer to it.

--- a/cc1/expr.c

+++ b/cc1/expr.c

@@ -566,16 +566,21 @@

 static Node *

 address(char op, Node *np)

 {

-	Node *new, *left;

+	Node *new;

 	/*

 	 * ansi c accepts & applied to a function name, and it generates

 	 * a function pointer

 	 */

-	left = np->left;

-	if (np->op == OADDR && left->sym && left->type->op == FTN)

-		return np;

+	if (np->op == OSYM) {

+		if (np->type->op == FTN)

+			return decay(np);

+		if (np->type->op == ARY)

+			goto dont_check_lvalue;

+	}

 	chklvalue(np);

+

+dont_check_lvalue:

 	if (np->sym && (np->sym->flags & SREGISTER))

 		errorp("address of register variable '%s' requested", yytext);

 	if (np->op == OPTR) {