fix wrong assertions in ply-video-buffer

diff --git a/src/ply-video-buffer.c b/src/ply-video-buffer.c
index 7b024bb0b4eefc6a52b792140fda8c3021d2be17..50294cb113cedd722e11ee783cfe825b4e2f69bc 100644 (file)
--- a/src/ply-video-buffer.c
+++ b/src/ply-video-buffer.c
@@ -257,10 +257,10 @@ ply_video_buffer_add_area_to_flush_area (PlyVideoBuffer     *buffer,
 {
   assert (buffer != NULL);
   assert (area != NULL);
-  assert (area->x >= 0);
-  assert (area->y >= 0);
-  assert (area->x < area->width);
-  assert (area->y < area->height);
+  assert (area->x >= buffer->area.x);
+  assert (area->y >= buffer->area.y);
+  assert (area->x < buffer->area.width);
+  assert (area->y < buffer->area.height);
   assert (area->width >= 0);
   assert (area->height >= 0);