alpm_logaction: check logfile before opening

valgrind does not like calling open(NULL, ...).  This also makes the
return value 0 if logfile has not been set.

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/libalpm/log.c b/lib/libalpm/log.c
index fceb96f4..c049bf90 100644
--- a/lib/libalpm/log.c
+++ b/lib/libalpm/log.c
@@ -53,7 +53,7 @@ int SYMEXPORT alpm_logaction(alpm_handle_t *handle, const char *prefix,
 	}
 
 	/* check if the logstream is open already, opening it if needed */
-	if(handle->logstream == NULL) {
+	if(handle->logstream == NULL && handle->logfile != NULL) {
 		int fd;
 		do {
 			fd = open(handle->logfile, O_WRONLY | O_APPEND | O_CREAT | O_CLOEXEC,