[gnome-builder] ctags: fix warning

[Christian Hergert <chergert src gnome org>]

commit ef073faa7bca071c717854efeb8499cf72842221
Author: Christian Hergert <christian hergert me>
Date:   Fri May 15 21:53:39 2015 -0700

    ctags: fix warning

 libide/ctags/ide-ctags-index.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libide/ctags/ide-ctags-index.c b/libide/ctags/ide-ctags-index.c
index 6305d81..a800a8c 100644
--- a/libide/ctags/ide-ctags-index.c
+++ b/libide/ctags/ide-ctags-index.c
@@ -188,7 +188,7 @@ ide_ctags_index_build_index (GTask        *task,
   IdeCtagsIndex *self = source_object;
   IdeLineReader reader;
   GError *error = NULL;
-  GArray *index;
+  GArray *index = NULL;
   gchar *contents = NULL;
   gchar *line;
   gsize length = 0;