6g: update for spec change CL 30586

R=ken
OCL=30593
CL=30756

src/cmd/gc/walk.c

@@ -209,15 +209,8 @@ implicitstar(Node **nn)
 	t = t->type;
 	if(t == T)
 		return;
-	switch(t->etype) {
-	case TMAP:
-	case TSTRING:
-	case TARRAY:
-	case TINTER:
-		break;
-	default:
+	if(!isfixedarray(t))
 		return;
-	}
 	n = nod(OIND, n, N);
 	walktype(n, Elv);
 	*nn = n;
@@ -1736,7 +1729,10 @@ lookdot(Node *n, Type *t)
 		n->xoffset = f1->width;
 		n->type = f1->type;
 		if(t->etype == TINTER) {
-			implicitstar(&n->left);
+			if(isptr[n->left->type->etype]) {
+				n->left = nod(OIND, n->left, N);	// implicitstar
+				walktype(n->left, Elv);
+			}
 			n->op = ODOTINTER;
 		}
 		return 1;