XCB: set window provider requested position from video-x and video-y

Note that only the Qt4 provider seem to use the values this far. Also,
most window managers will move the window wherever they see fit anyway.

modules/video_output/xcb/common.c

@@ -125,6 +125,8 @@ vout_window_t *GetWindow (vout_display_t *vd,
 
     memset( &wnd_cfg, 0, sizeof(wnd_cfg) );
     wnd_cfg.type = VOUT_WINDOW_TYPE_XID;
+    wnd_cfg.x = var_InheritInteger (vd, "video-x");
+    wnd_cfg.y = var_InheritInteger (vd, "video-y");
     wnd_cfg.width  = vd->cfg->display.width;
     wnd_cfg.height = vd->cfg->display.height;
 

modules/video_output/xcb/glx.c

@@ -90,6 +90,8 @@ static vout_window_t *MakeWindow (vout_display_t *vd)
 
     memset (&wnd_cfg, 0, sizeof (wnd_cfg));
     wnd_cfg.type = VOUT_WINDOW_TYPE_XID;
+    wnd_cfg.x = var_InheritInteger (vd, "video-x");
+    wnd_cfg.y = var_InheritInteger (vd, "video-y");
     wnd_cfg.width  = vd->cfg->display.width;
     wnd_cfg.height = vd->cfg->display.height;