[gnome-builder] ctags: fix potential NULL word with new text-iter design

[Christian Hergert <chergert src gnome org>]

commit 683252496c1756bc1397d25a8319d439453b0bc9
Author: Christian Hergert <chergert redhat com>
Date:   Wed May 2 22:30:21 2018 -0700

    ctags: fix potential NULL word with new text-iter design
    
    Now that _ide_text_iter_current_symbol() is used (which can return NULL)
    we need to be more careful here.

 src/plugins/ctags/ide-ctags-completion-provider.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)
---
diff --git a/src/plugins/ctags/ide-ctags-completion-provider.c 
b/src/plugins/ctags/ide-ctags-completion-provider.c
index 6e081b781..ca6027568 100644
--- a/src/plugins/ctags/ide-ctags-completion-provider.c
+++ b/src/plugins/ctags/ide-ctags-completion-provider.c
@@ -201,6 +201,13 @@ ide_ctags_completion_provider_populate (GtkSourceCompletionProvider *provider,
   g_clear_pointer (&self->current_word, g_free);
   self->current_word = ide_completion_provider_context_current_word (context);
 
+  if (self->current_word == NULL)
+    IDE_GOTO (word_too_small);
+
+  word_len = strlen (self->current_word);
+  if (word_len < self->minimum_word_size)
+    IDE_GOTO (word_too_small);
+
   allowed = get_allowed_suffixes (context);
 
   if (self->results != NULL)
@@ -213,10 +220,6 @@ ide_ctags_completion_provider_populate (GtkSourceCompletionProvider *provider,
       g_clear_pointer (&self->results, g_object_unref);
     }
 
-  word_len = strlen (self->current_word);
-  if (word_len < self->minimum_word_size)
-    IDE_GOTO (word_too_small);
-
   casefold = g_utf8_casefold (self->current_word, -1);
 
   self->results = ide_completion_results_new (self->current_word);