core: do not overwrite visible size

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

src/video_output/display.c

@@ -1292,14 +1292,9 @@ static vout_display_t *DisplayNew(vout_thread_t *vout,
     }
     owner.sys = osys;
 
-    /* */
+    /* keep a reference to the source before display */
     video_format_t source = *source_org;
 
-    source.i_x_offset = 0;
-    source.i_y_offset = 0;
-    source.i_visible_width  = source.i_width;
-    source.i_visible_height = source.i_height;
-
     vout_display_t *p_display = vout_display_New(VLC_OBJECT(vout),
                                                  module, !is_wrapper,
                                                  &source, cfg, &owner);