[librsvg: 20/30] Handle two easy error cases from paint / paint_with_alpha

[Marge Bot <marge-bot src gnome org>]

commit e9fce2a8d4a4b6d85c3d16242b2e0f943327a972
Author: Federico Mena Quintero <federico gnome org>
Date:   Mon Jun 21 18:52:21 2021 -0500

    Handle two easy error cases from paint / paint_with_alpha
    
    Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/516>

 src/drawing_ctx.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/drawing_ctx.rs b/src/drawing_ctx.rs
index e6f41992..a1db311f 100644
--- a/src/drawing_ctx.rs
+++ b/src/drawing_ctx.rs
@@ -824,9 +824,9 @@ impl DrawingCtx {
                     self.cr.set_operator(stacking_ctx.mix_blend_mode.into());
 
                     if opacity < 1.0 {
-                        self.cr.paint_with_alpha(opacity);
+                        self.cr.paint_with_alpha(opacity)?;
                     } else {
-                        self.cr.paint();
+                        self.cr.paint()?;
                     }
                 }