[gtksourceview] SearchContext: fix the unit tests

[Sébastien Wilmet <swilmet src gnome org>]

commit b5e8148190a3ebdeb16e6d3b2bfac4e7961caa5b
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Aug 15 17:51:11 2013 +0200

    SearchContext: fix the unit tests

 gtksourceview/gtksourcesearchcontext.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gtksourceview/gtksourcesearchcontext.c b/gtksourceview/gtksourcesearchcontext.c
index bae718c..f2fd45c 100644
--- a/gtksourceview/gtksourcesearchcontext.c
+++ b/gtksourceview/gtksourcesearchcontext.c
@@ -1593,6 +1593,8 @@ scan_region_forward (GtkSourceSearchContext *search,
 
                scan_subregion (search, &start, &limit);
 
+               gtk_text_region_subtract (region, &start, &limit);
+
                start_line = gtk_text_iter_get_line (&start);
                limit_line = gtk_text_iter_get_line (&limit);
 
@@ -1625,6 +1627,8 @@ scan_region_backward (GtkSourceSearchContext *search,
 
                scan_subregion (search, &limit, &end);
 
+               gtk_text_region_subtract (region, &limit, &end);
+
                limit_line = gtk_text_iter_get_line (&limit);
                end_line = gtk_text_iter_get_line (&end);