map literals

R=r
OCL=14759
CL=14759
diff --git a/src/cmd/gc/go.y b/src/cmd/gc/go.y
index 20d4ffa..a02425c 100644
--- a/src/cmd/gc/go.y
+++ b/src/cmd/gc/go.y
@@ -990,7 +990,7 @@
 keyval:
 	expr ':' expr
 	{
-		$$ = nod(OLIST, $1, $3);
+		$$ = nod(OKEY, $1, $3);
 	}
 
 /*