[PATCHv4 6/6] Remove forward declaration of an enum

[Elijah Newren <newren@gmail.com>]

According to http://c-faq.com/null/machexamp.html, sizeof(char*) !=
sizeof(int*) on some platforms.  Since an enum could be a char or int
(or long or...), knowing the size of the enum thus is important to
knowing the size of a pointer to an enum, so we cannot just forward
declare an enum the way we can a struct.  (Also, modern C++ compilers
apparently define forward declarations of an enum to either be useless
because the enum was defined, or require an explicit size specifier, or
be a compilation error.)

Helped-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Elijah Newren <newren@gmail.com>
---
 packfile.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packfile.h b/packfile.h
index cc7eaffe1b..fa36c473ad 100644
--- a/packfile.h
+++ b/packfile.h
@@ -1,12 +1,12 @@
 #ifndef PACKFILE_H
 #define PACKFILE_H
 
+#include "cache.h"
 #include "oidset.h"
 
 /* in object-store.h */
 struct packed_git;
 struct object_info;
-enum object_type;
 
 /*
  * Generate the filename to be used for a pack file with checksum "sha1" and
-- 
2.18.0.553.g74975b7909