refs.c: fix fread error handling

fread returns the number of items read, with no special error return.

Commit 98f85ff (reflog: add for_each_reflog_ent_reverse() API -
2013-03-08) introduced a call to fread which checks for an error with
"nread < 0" which is tautological since nread is unsigned.  The correct
check in this case (which tries to read a single item) is "nread != 1".

Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/refs.c b/refs.c
index 8e24060d804346823cd2d89a94ff431617a56194..aa79c93045f3582e6d901d475f70f696c50bcb11 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -2357,7 +2357,7 @@ int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn, void
                        return error("cannot seek back reflog for %s: %s",
                                     refname, strerror(errno));
                nread = fread(buf, cnt, 1, logfp);
-               if (nread < 0)
+               if (nread != 1)
                        return error("cannot read %d bytes from reflog for %s: %s",
                                     cnt, refname, strerror(errno));
                pos -= cnt;