[PATCH 1/4] cat_one_file(): make it easy to see that the `size` variable is initialized

["Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>]

From: Johannes Schindelin <johannes.schindelin@gmx.de>

The large `switch` statement makes it a bit impractical to reason about
the code.

One of the code paths can technically lead to using `size` without being
initialized: if the `t` case is taken and the type name is set to the
empty string, we would actually leave `size` unintialized right until we
use it.

Practically, this cannot happen because the
`do_oid_object_info_extended()` function is expected to always populate
the `type_name` if asked for. However, it is quite unnecessary to leave
the code as unwieldy to reason about: Just initialize the variable to 0
and be done with it.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 builtin/cat-file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index b13561cf73b..128c901fa8e 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -104,7 +104,7 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
 	struct object_id oid;
 	enum object_type type;
 	char *buf;
-	unsigned long size;
+	unsigned long size = 0;
 	struct object_context obj_context = {0};
 	struct object_info oi = OBJECT_INFO_INIT;
 	struct strbuf sb = STRBUF_INIT;
-- 
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