[gtk/fix-textiter-tests] textbuffer: Fix a test failure

[Matthias Clasen <matthiasc src gnome org>]

commit 4340f753044044615962b20e9abb6bbc1197333e
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Aug 2 17:23:26 2020 -0400

    textbuffer: Fix a test failure
    
    The previous change to gtktextbuffer.c was breaking
    the textiter testcase.

 gtk/gtktextbuffer.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtktextbuffer.c b/gtk/gtktextbuffer.c
index 1f616bdce1..0b03f97c62 100644
--- a/gtk/gtktextbuffer.c
+++ b/gtk/gtktextbuffer.c
@@ -1605,10 +1605,14 @@ insert_range_not_inside_self (GtkTextBuffer     *buffer,
   GtkTextIter end = *orig_end;
   GtkTextIter range_start;
   GtkTextIter range_end;
+  gboolean insert_tags;
 
   if (gtk_text_iter_equal (orig_start, orig_end))
     return;
 
+  insert_tags = gtk_text_buffer_get_tag_table (gtk_text_iter_get_buffer (orig_start))
+                == gtk_text_buffer_get_tag_table (buffer);
+
   gtk_text_iter_order (&start, &end);
 
   range_start = start;
@@ -1647,7 +1651,7 @@ insert_range_not_inside_self (GtkTextBuffer     *buffer,
       restore_range (r);
       r = NULL;
 
-      if (gtk_text_buffer_get_tag_table (gtk_text_iter_get_buffer (orig_start)) == 
gtk_text_buffer_get_tag_table (buffer))
+      if (insert_tags)
         {
           gtk_text_buffer_get_iter_at_offset (buffer, &start_iter, start_offset);