[glom] Print Layout: Increase page count correctly when expanding portals.

[Murray Cumming <murrayc src gnome org>]

commit 7e1d146602456ef7338d2889448a30099fadd226
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Oct 14 02:43:47 2011 +0200

    Print Layout: Increase page count correctly when expanding portals.
    
    	* glom/print_layout/canvas_print_layout.cc: move_items_below_item():
    	Correct an off-by-one error in the calculation of the number of pages
    	needed.

 ChangeLog                                |    8 ++++++++
 glom/print_layout/canvas_print_layout.cc |    6 +++---
 2 files changed, 11 insertions(+), 3 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 29c5110..79fa92b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,13 @@
 2011-10-14  Murray Cumming  <murrayc murrayc com>
 
+	Print Layout: Increase page count correctly when expanding portals.
+
+	* glom/print_layout/canvas_print_layout.cc: move_items_below_item():
+	Correct an off-by-one error in the calculation of the number of pages
+	needed.
+
+2011-10-14  Murray Cumming  <murrayc murrayc com>
+
 	Print Layout: Create standard: Use the multiline text formatting.
 
 	* glom/print_layout/print_layout_utils.cc: create_standard():
diff --git a/glom/print_layout/canvas_print_layout.cc b/glom/print_layout/canvas_print_layout.cc
index ff2eada..c5e0876 100644
--- a/glom/print_layout/canvas_print_layout.cc
+++ b/glom/print_layout/canvas_print_layout.cc
@@ -1247,11 +1247,11 @@ void Canvas_PrintLayout::move_items_below_item(const Glib::RefPtr<CanvasLayoutIt
   }
 
   //Add extra pages if necessary:
-  const guint page_count_needed = PrintLayoutUtils::get_page_for_y(page_Setup, 
+  const guint last_page_needed = PrintLayoutUtils::get_page_for_y(page_Setup, 
     property_units(), bottom_max);
-  if(page_count_needed > get_page_count())
+  if((last_page_needed + 1) > get_page_count())
   {
-    set_page_count(page_count_needed);
+    set_page_count(last_page_needed + 1);
   }
 }