codec/avcodec/vaapi_x11.c: Cleanup

Simplify check for valid surface and chroma.
(cherry picked from commit c4da95eba6eaa8e7a15025c108c1e7296ec23bed)

modules/codec/avcodec/vaapi_x11.c

@@ -1266,27 +1266,16 @@ static void DisplayPicture(vout_display_t *vd, picture_t *pic, subpicture_t *sub
 {
     vout_display_sys_t *sys = vd->sys;
 
-    if (pic->p_sys == NULL)
-    {
-        assert(pic->format.i_chroma == VLC_CODEC_VAAPI_SURFACE);
-        msg_Err(vd, "discarding picture without picture_sys_t information");
-        if (subpicture)
-            subpicture_Delete(subpicture);
-        picture_Release(pic);
-        return;
-    }
+    assert(pic->format.i_chroma == VLC_CODEC_VAAPI_SURFACE);
 
-    if (pic->p_sys->i_id == VA_INVALID_SURFACE)
+    if ((pic->p_sys == NULL) || (pic->p_sys->i_id == VA_INVALID_SURFACE))
     {
-        assert(pic->format.i_chroma == VLC_CODEC_VAAPI_SURFACE);
-        msg_Err(vd, "discarding picture without surface information: %p (refcount %d, forced %s)",
-                pic, pic->i_refcount, pic->b_force ? "true" : "false" );
+        msg_Err(vd, "discarding picture without picture_sys_t information");
         if (subpicture)
             subpicture_Delete(subpicture);
         picture_Release(pic);
         return;
     }
-    assert(pic->format.i_chroma == VLC_CODEC_VAAPI_SURFACE);
 
     picture_sys_t *surface = pic->p_sys;
 
@@ -1381,7 +1370,7 @@ static void PictureUnlock(picture_t *picture)
         surface->i_refcount--;
 
     //assert(surface->i_refcount == 0);
-    surface->i_refcount = 0;
+    //surface->i_refcount = 0;
     surface->i_cache = VA_INVALID_ID;
 }