refs/refs-internal.h: avoid forward declaration of an enum

Include iterator.h to define enum iterator_selection.

Signed-off-by: Beat Bolli <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: bbolli

refs/refs-internal.h

@@ -1,6 +1,8 @@
 #ifndef REFS_REFS_INTERNAL_H
 #define REFS_REFS_INTERNAL_H
 
+#include "iterator.h"   /* for enum iterator_selection */
+
 /*
  * Data structures and functions for the internal use of the refs
  * module. Code outside of the refs module should use only the public