[gnome-builder] clang: allow _ when matching provider activation

[Christian Hergert <chergert src gnome org>]

commit e8085f17ac259b2f5334ede54b9bac6bbebbc0d2
Author: Christian Hergert <chergert redhat com>
Date:   Mon Sep 4 12:58:30 2017 -0700

    clang: allow _ when matching provider activation
    
    This fixes an issue where typing gtk_| woucld cause the list to disappear.

 plugins/clang/ide-clang-completion-provider.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/clang/ide-clang-completion-provider.c b/plugins/clang/ide-clang-completion-provider.c
index 5126ce2..b778003 100644
--- a/plugins/clang/ide-clang-completion-provider.c
+++ b/plugins/clang/ide-clang-completion-provider.c
@@ -172,7 +172,7 @@ ide_clang_completion_provider_match (GtkSourceCompletionProvider *provider,
 
       ch = gtk_text_iter_get_char (&iter);
 
-      if (!g_unichar_isalnum (ch))
+      if (!g_unichar_isalnum (ch) && ch != '_')
         return FALSE;
     }