After freeing the logfilename, we set logfilename to NULL, in case of an
error which returns without setting logfilename.

Signed-off-by: Robert Foley <robert.foley@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
---
v2
    - moved this change to the beginning of the patch series.
---
v1
    - This is new in the patch v1.
---
 util/log.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/util/log.c b/util/log.c
index 1ca13059ee..4316fe74ee 100644
--- a/util/log.c
+++ b/util/log.c
@@ -113,6 +113,7 @@ void qemu_set_log_filename(const char *filename, Error **errp)
 {
     char *pidstr;
     g_free(logfilename);
+    logfilename = NULL;
 
     pidstr = strstr(filename, "%");
     if (pidstr) {
-- 
2.17.1