[gimp] app: verify input argumets in gimp_spawn_async()

[N/A <ell src gnome org>]

commit 95af939903cbc9d7ba94d6b4cbb8a779db2539f5
Author: Ell <ell_se yahoo com>
Date:   Mon Mar 5 02:54:42 2018 -0500

    app: verify input argumets in gimp_spawn_async()

 app/core/gimp-spawn.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/app/core/gimp-spawn.c b/app/core/gimp-spawn.c
index 0bfc46f..7fcb093 100644
--- a/app/core/gimp-spawn.c
+++ b/app/core/gimp-spawn.c
@@ -155,6 +155,8 @@ gimp_spawn_async (gchar       **argv,
                   GPid         *child_pid,
                   GError      **error)
 {
+  g_return_val_if_fail (argv != NULL, FALSE);
+
 #ifdef HAVE_VFORK
   if (flags == (G_SPAWN_LEAVE_DESCRIPTORS_OPEN |
                 G_SPAWN_DO_NOT_REAP_CHILD      |