[gnome-builder] omni-gutter: fallback to diff: scheme styles

[Christian Hergert <chergert src gnome org>]

commit 8d256ffb075c985dcac01e3c27893721de4eb932
Author: Christian Hergert <chergert redhat com>
Date:   Tue Jan 25 00:37:45 2022 -0800

    omni-gutter: fallback to diff: scheme styles
    
    If we have a style for these, we might as well use them.

 src/plugins/omni-gutter/gbp-omni-gutter-renderer.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/src/plugins/omni-gutter/gbp-omni-gutter-renderer.c 
b/src/plugins/omni-gutter/gbp-omni-gutter-renderer.c
index 2499c2d6a..14298cab2 100644
--- a/src/plugins/omni-gutter/gbp-omni-gutter-renderer.c
+++ b/src/plugins/omni-gutter/gbp-omni-gutter-renderer.c
@@ -427,13 +427,16 @@ reload_style_colors (GbpOmniGutterRenderer *self,
   /* These gutter:: prefix values come from Builder's style-scheme xml
    * files, but other style schemes may also support them now too.
    */
-  if (!get_style_rgba (scheme, "gutter::added-line", FOREGROUND, &self->changes.add))
+  if (!get_style_rgba (scheme, "gutter::added-line", FOREGROUND, &self->changes.add) &&
+      !get_style_rgba (scheme, "diff:added-line", FOREGROUND, &self->changes.add))
     gdk_rgba_parse (&self->changes.add, "#8ae234");
 
-  if (!get_style_rgba (scheme, "gutter::changed-line", FOREGROUND, &self->changes.change))
+  if (!get_style_rgba (scheme, "gutter::changed-line", FOREGROUND, &self->changes.change) &&
+      !get_style_rgba (scheme, "diff:changed-line", FOREGROUND, &self->changes.change))
     gdk_rgba_parse (&self->changes.change, "#fcaf3e");
 
-  if (!get_style_rgba (scheme, "gutter::removed-line", FOREGROUND, &self->changes.remove))
+  if (!get_style_rgba (scheme, "gutter::removed-line", FOREGROUND, &self->changes.remove) &&
+      !get_style_rgba (scheme, "diff:removed-line", FOREGROUND, &self->changes.remove))
     gdk_rgba_parse (&self->changes.remove, "#ef2929");
 
   /*