[gnome-sudoku] Clear unfillable squares warnings on Undo/Redo board

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 08360b6c3f2a228f2fd096bf3ee0a3834a022421
Author: Parin Porecha <parinporecha gmail com>
Date:   Sun Jun 29 11:49:12 2014 +0200

    Clear unfillable squares warnings on Undo/Redo board
    
    https://bugzilla.gnome.org/show_bug.cgi?id=732398

 src/sudoku-view.vala |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)
---
diff --git a/src/sudoku-view.vala b/src/sudoku-view.vala
index 210e18a..a3cc34a 100644
--- a/src/sudoku-view.vala
+++ b/src/sudoku-view.vala
@@ -422,10 +422,7 @@ private class SudokuCellView : Gtk.DrawingArea
         if (row == this.row && col == this.col)
         {
             this.value = new_val;
-            if (new_val == 0)
-            {
-                notify_property("value");
-            }
+            notify_property("value");
         }
     }
 }