do not use fake names on anonymous function return values

R=ken
OCL=17679
CL=17679

src/cmd/6g/gsubr.c

@@ -1002,10 +1002,8 @@ naddr(Node *n, Addr *a)
 		a->etype = n->etype;
 		a->offset = n->xoffset;
 		a->sym = n->sym;
-		if(a->sym == S) {
+		if(a->sym == S)
 			a->sym = lookup(".noname");
-			fatal("noname");
-		}
 		if(n->method) {
 			if(n->type != T)
 			if(n->type->sym != S)

src/cmd/gc/dcl.c

@@ -472,12 +472,8 @@ loop:
 	if(n->left != N && n->left->op == ONAME) {
 		f->nname = n->left;
 		f->embedded = n->embedded;
-	} else {
-		vargen++;
-		snprint(buf, sizeof(buf), "_e%s_%.3ld", filename, vargen);
-		f->nname = newname(lookup(buf));
+		f->sym = f->nname->sym;
 	}
-	f->sym = f->nname->sym;
 
 	*t = f;
 	t = &f->down;

src/cmd/gc/subr.c

@@ -1061,7 +1061,7 @@ Tpretty(Fmt *fp, Type *t)
 		return fmtprint(fp, " }");
 
 	case TFIELD:
-		if(t->sym == S || t->sym->name[0] == '_' || t->embedded) {
+		if(t->sym == S || t->embedded) {
 			if(exporting)
 				fmtprint(fp, "? ");
 			return fmtprint(fp, "%T", t->type);