[PATCH 09/11] pack-mtimes: avoid closing a bogus file descriptor

From: Johannes Schindelin <redacted>

In 94cd775a6c52 (pack-mtimes: support reading .mtimes files,
2022-05-20), code was added to close the file descriptor corresponding
to the mtimes file.

However, it is possible that opening that file failed, in which case we
are closing a file descriptor with the value `-1`. Let's guard that
`close()` call.

Reported by Coverity.

Signed-off-by: Johannes Schindelin <redacted>
---
 pack-mtimes.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pack-mtimes.c b/pack-mtimes.c
index 0e0aafdcb06..0f9785fc5e4 100644
--- a/pack-mtimes.c
+++ b/pack-mtimes.c

@@ -89,7 +89,8 @@ cleanup:
 		*data_p = data;
 	}
 
-	close(fd);
+	if (fd >= 0)
+		close(fd);
 	return ret;
 }
 

-- 
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