[PATCH] Fix some sparse warnings

[Ramsay Jones <ramsay@ramsay1.demon.co.uk>]

Sparse issues three "Using plain integer as NULL pointer" warnings.
Each warning relates to the use of an '{0}' initialiser expression
in the declaration of an 'struct object_info'. The first field of
this structure has pointer type. Thus, in order to suppress these
warnings, we replace the initialiser expression with '{NULL}'.

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
---

Hi Jeff,

If you need to re-roll the patches in your 'jk/in-pack-size-measurement'
branch, could you please squash this (or something like it) into the
patches equivalent to commit 7c07385d ("zero-initialize object_info structs",
07-07-2013) [sha1_file.c and streaming.c] and commit 778d263a ("cat-file: add
--batch-disk-sizes option", 07-07-2013) [builtin/cat-file.c].

Thanks!

ATB,
Ramsay Jones


 builtin/cat-file.c | 2 +-
 sha1_file.c        | 2 +-
 streaming.c        | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index bf12883..860576e 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -135,7 +135,7 @@ static int batch_one_object(const char *obj_name, int print_contents)
 	if (print_contents == BATCH)
 		contents = read_sha1_file(sha1, &type, &size);
 	else if (print_contents == BATCH_DISK_SIZES) {
-		struct object_info oi = {0};
+		struct object_info oi = {NULL};
 		oi.disk_sizep = &size;
 		type = sha1_object_info_extended(sha1, &oi);
 	}
diff --git a/sha1_file.c b/sha1_file.c
index 4c2365f..e4ab0a4 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -2440,7 +2440,7 @@ int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi)
 
 int sha1_object_info(const unsigned char *sha1, unsigned long *sizep)
 {
-	struct object_info oi = {0};
+	struct object_info oi = {NULL};
 
 	oi.sizep = sizep;
 	return sha1_object_info_extended(sha1, &oi);
diff --git a/streaming.c b/streaming.c
index cac282f..5710065 100644
--- a/streaming.c
+++ b/streaming.c
@@ -135,7 +135,7 @@ struct git_istream *open_istream(const unsigned char *sha1,
 				 struct stream_filter *filter)
 {
 	struct git_istream *st;
-	struct object_info oi = {0};
+	struct object_info oi = {NULL};
 	const unsigned char *real = lookup_replace_object(sha1);
 	enum input_source src = istream_source(real, type, &oi);
 
-- 
1.8.3