[glib] tests: Fix leak in appmonitor test

[Philip Withnall <pwithnall src gnome org>]

commit 3ce00b29ec0bb240412506affb5c65bdb18c7ad3
Author: Philip Withnall <withnall endlessm com>
Date:   Fri Aug 18 09:37:23 2017 +0100

    tests: Fix leak in appmonitor test
    
    Spotted by Daniel Macks.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=785260

 gio/tests/appmonitor.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gio/tests/appmonitor.c b/gio/tests/appmonitor.c
index 34661d8..be46bba 100644
--- a/gio/tests/appmonitor.c
+++ b/gio/tests/appmonitor.c
@@ -97,11 +97,12 @@ test_app_monitor (void)
 int
 main (int argc, char *argv[])
 {
-  gchar *path;
+  gchar *path = NULL;
 
   path = g_mkdtemp (g_strdup ("app_monitor_XXXXXX"));
   g_setenv ("XDG_DATA_DIRS", path, TRUE);
   g_setenv ("XDG_DATA_HOME", path, TRUE);
+  g_free (path);
 
   g_test_init (&argc, &argv, NULL);