[retro-gtk] retro-core: Fix adding disk indexes

[Adrien Plazas <aplazas src gnome org>]

commit 12973e9cb1851c20ba2f6fe9403fd608f1fa04a1
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Mon Mar 2 20:33:48 2020 +0500

    retro-core: Fix adding disk indexes
    
    Loop until an error happens, not while there are errors.

 retro-runner/retro-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/retro-runner/retro-core.c b/retro-runner/retro-core.c
index 1c1c132..0470160 100644
--- a/retro-runner/retro-core.c
+++ b/retro-runner/retro-core.c
@@ -834,7 +834,7 @@ load_discs (RetroCore  *self,
 
   length = g_strv_length (self->media_uris);
   while (get_disk_images_number (self, &tmp_error) < length &&
-         (tmp_error != NULL)) {
+         (tmp_error == NULL)) {
    add_disk_image_index (self, &tmp_error);
     if (G_UNLIKELY (tmp_error != NULL)) {
       g_propagate_error (error, tmp_error);