Fix segmentation fault on image downloading

Some images are bugged in telegram (as in they're detected but you cant download them) so this should fix the crash when trying to download these files.

1 files changed, 7 insertions, 0 deletions

diff --git a/queries.c b/queries.c
index 5c1c528..8ea9340 100644
--- a/queries.c
+++ b/queries.c
@@ -3301,6 +3301,13 @@ void tgl_do_load_file_location (struct tgl_state *TLS, struct tgl_file_location
 }
 
 void tgl_do_load_photo (struct tgl_state *TLS, struct tgl_photo *photo, void (*callback)(struct tgl_state *TLS, void *callback_extra, int success, const char *filename), void *callback_extra) {
+  if(photo == NULL) {
+    tgl_set_query_error (TLS, EINVAL, "Bad photo (cannot download");
+    if (callback) {
+      callback (TLS, callback_extra, 0, 0);
+    }
+    return;
+  }
   if (!photo->sizes_num) {
     tgl_set_query_error (TLS, EINVAL, "Bad photo (no photo sizes");
     if (callback) {