[gnome-builder] source-view: special case end-of-file with smart backspace

[Christian Hergert <chergert src gnome org>]

commit f9bd64bbdf85ae36ed427a6f4b8aed908a866a4a
Author: Christian Hergert <christian hergert me>
Date:   Sat Apr 25 15:11:36 2015 -0700

    source-view: special case end-of-file with smart backspace
    
    If we are at the end of the file, we will have a gunichar of zero. Handle
    this specially, since it's okay to continue to walk backwards.

 libide/ide-source-view.c |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)
---
diff --git a/libide/ide-source-view.c b/libide/ide-source-view.c
index aa92bb3..aca0faa 100644
--- a/libide/ide-source-view.c
+++ b/libide/ide-source-view.c
@@ -2104,10 +2104,18 @@ ide_source_view_do_smart_backspace (IdeSourceView *self,
 
   /* if the line isn't empty up to our cursor, ignore */
   tmp = insert;
-  while (!gtk_text_iter_starts_line (&tmp))
+  while (TRUE)
     {
-      if (!g_unichar_isspace (gtk_text_iter_get_char (&tmp)))
+      gunichar ch;
+
+      ch = gtk_text_iter_get_char (&tmp);
+
+      if ((ch != 0) && !g_unichar_isspace (ch))
         IDE_RETURN (FALSE);
+
+      if (gtk_text_iter_starts_line (&tmp))
+        break;
+
       gtk_text_iter_backward_char (&tmp);
     }