stat_tracking_info(): clear object flags used during counting

When left-right traversal counts the commits in a diverged history, it
leaves the flags in the commits smudged, and we need to clear them before
we return.  Otherwise the caller cannot inspect other branches with this
function again.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

remote.c

@@ -1295,6 +1295,10 @@ int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs)
 		else
 			(*num_theirs)++;
 	}
+
+	/* clear object flags smudged by the above traversal */
+	clear_commit_marks(ours, ALL_REV_FLAGS);
+	clear_commit_marks(theirs, ALL_REV_FLAGS);
 	return 1;
 }