[gnome-builder] ide-buffer: set a fallback for TAG_SNIPPET_TAB_STOP

[Sébastien Lafargue <slafargue src gnome org>]

commit a21be2203214f9ce4066886ddcfcdac322004ec0
Author: Sebastien Lafargue <slafargue gnome org>
Date:   Tue Oct 25 16:26:59 2016 +0200

    ide-buffer: set a fallback for TAG_SNIPPET_TAB_STOP
    
    If we don't have "snippet::tab-stop" in
    the style scheme, we use PANGO_UNDERLINE_SINGLE instead

 libide/buffers/ide-buffer.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/libide/buffers/ide-buffer.c b/libide/buffers/ide-buffer.c
index 9fd356f..85b664a 100644
--- a/libide/buffers/ide-buffer.c
+++ b/libide/buffers/ide-buffer.c
@@ -1071,9 +1071,12 @@ ide_buffer_notify_style_scheme (IdeBuffer  *self,
                      "underline-rgba", &warning_rgba,
                      NULL);
 
-      ide_source_style_scheme_apply_style (style_scheme,
-                                           TAG_SNIPPET_TAB_STOP,
-                                           GET_TAG (TAG_SNIPPET_TAB_STOP));
+      if (!ide_source_style_scheme_apply_style (style_scheme,
+                                                TAG_SNIPPET_TAB_STOP,
+                                                GET_TAG (TAG_SNIPPET_TAB_STOP)))
+        apply_style (GET_TAG (TAG_SNIPPET_TAB_STOP),
+                     "underline", PANGO_UNDERLINE_SINGLE,
+                     NULL);
 
       if (!ide_source_style_scheme_apply_style (style_scheme,
                                                 TAG_DEFINITION,