[PATCH] index-pack: correctly initialize appended objects

From: Björn Steinbrink <redacted>

When index-pack completes a thin pack it appends objects to the pack.  
Since the commit 92392b4(index-pack: Honor core.deltaBaseCacheLimit when 
resolving deltas) such an object can be pruned in case of memory
pressure.

To be able to re-read the object later, a few more fields have to be set.

Noticed by Pierre Habouzit.

Hopefully-signed-off-by: Björn Steinbrink [off-list ref]
Hopefully-reviewed-and-signed-off-by: Nicolas Pitre [off-list ref], 

--

	This was probably missed in the flurry of patches, scratched 
	patches, and new patches.

	Nico could you have a quick look?  (I would ask Shawn, but I know 
	that he is pretty busy with real world issues.)

diff --git a/index-pack.c b/index-pack.c
index ac20a46..33ba8ef 100644
--- a/index-pack.c
+++ b/index-pack.c

@@ -699,6 +699,9 @@ static struct object_entry *append_obj_to_pack(
 	write_or_die(output_fd, header, n);
 	obj[0].idx.crc32 = crc32(0, Z_NULL, 0);
 	obj[0].idx.crc32 = crc32(obj[0].idx.crc32, header, n);
+	obj[0].hdr_size = n;
+	obj[0].type = type;
+	obj[0].size = size;
 	obj[1].idx.offset = obj[0].idx.offset + n;
 	obj[1].idx.offset += write_compressed(output_fd, buf, size, &obj[0].idx.crc32);
 	hashcpy(obj->idx.sha1, sha1);