[PATCH] fix pack-object buffer size

The input line has 40 _chars_ of sha1 and no 20 _bytes_. It should also 
account for the space before the pathname, and the terminating \n and \0.

Signed-off-by: Nicolas Pitre <redacted>
---

I doubt anyone has ever used a repository with paths long enough to hit 
the limit, but better make it right nevertheless.

diff --git a/pack-objects.c b/pack-objects.c
index 09f4f2c..3c2767b 100644
--- a/pack-objects.c
+++ b/pack-objects.c

@@ -1231,7 +1231,7 @@ static void setup_progress_signal(void)
 int main(int argc, char **argv)
 {
 	SHA_CTX ctx;
-	char line[PATH_MAX + 20];
+	char line[40 + 1 + PATH_MAX + 2];
 	int window = 10, depth = 10, pack_to_stdout = 0;
 	struct object_entry **list;
 	int num_preferred_base = 0;