json: fix potential crash when source file or title number doesn't exist

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@7064 b64f7644-9d1e-0410-96f1-a4d463321fa5

1 files changed, 5 insertions, 0 deletions

diff --git a/libhb/hb_json.c b/libhb/hb_json.c
index f8d58f683..882a3f76b 100644
--- a/libhb/hb_json.c
+++ b/libhb/hb_json.c
@@ -801,6 +801,11 @@ hb_job_t* hb_dict_to_job( hb_handle_t * h, hb_dict_t *dict )
     }
 
     job = hb_job_init_by_index(h, titleindex);
+    if (job == NULL)
+    {
+        hb_error("hb_dict_to_job: Title %d doesn't exist", titleindex);
+        return NULL;
+    }
 
     hb_value_array_t *chapter_list = NULL;
     hb_value_array_t *audio_list = NULL;