[gnome-shell/wip/rstrode/login-screen-extensions: 113/134] st/shadow: Check pipeline when painting

[Ray Strode <halfline src gnome org>]

commit ab4412bdcca80cf6235c8db07e419ba8f1a11c87
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Jun 9 19:48:06 2020 +0200

    st/shadow: Check pipeline when painting
    
    We shouldn't simply assume that st_shadow_helper_update() has been
    called before paint() or that the pipeline was created successfully.

 src/st/st-shadow.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)
---
diff --git a/src/st/st-shadow.c b/src/st/st-shadow.c
index f3a22f0346..7665de7552 100644
--- a/src/st/st-shadow.c
+++ b/src/st/st-shadow.c
@@ -289,9 +289,10 @@ st_shadow_helper_paint (StShadowHelper  *helper,
                         ClutterActorBox *actor_box,
                         guint8           paint_opacity)
 {
-  _st_paint_shadow_with_opacity (helper->shadow,
-                                 framebuffer,
-                                 helper->pipeline,
-                                 actor_box,
-                                 paint_opacity);
+  if (helper->pipeline != NULL)
+    _st_paint_shadow_with_opacity (helper->shadow,
+                                   framebuffer,
+                                   helper->pipeline,
+                                   actor_box,
+                                   paint_opacity);
 }