[gnome-mines] Fixed custom size entry (bgo #738607)

[Robert Roth <robertroth src gnome org>]

commit 66cb71b9c5e801814c8efc3ce4b5c3ee85f759c2
Author: Robert Roth <robert roth off gmail com>
Date:   Thu Oct 16 20:00:00 2014 +0300

    Fixed custom size entry (bgo #738607)

 src/gnome-mines.vala |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/gnome-mines.vala b/src/gnome-mines.vala
index e720007..d394a28 100644
--- a/src/gnome-mines.vala
+++ b/src/gnome-mines.vala
@@ -307,15 +307,18 @@ public class Mines : Gtk.Application
         var field_width_entry = (Gtk.SpinButton) builder.get_object ("width_spin_btn");
         field_width_entry.set_range (XSIZE_MIN, XSIZE_MAX);
         field_width_entry.value_changed.connect (xsize_spin_cb);
+        field_width_entry.set_increments (1, 1);
         field_width_entry.set_value (settings.get_int (KEY_XSIZE));
 
         var field_height_entry = (Gtk.SpinButton) builder.get_object ("height_spin_btn");
         field_height_entry.set_range (YSIZE_MIN, YSIZE_MAX);
         field_height_entry.value_changed.connect (ysize_spin_cb);
+        field_height_entry.set_increments (1, 1);
         field_height_entry.set_value (settings.get_int (KEY_YSIZE));
 
         mines_spin = (Gtk.SpinButton) builder.get_object ("mines_spin_btn");
         mines_spin.set_range (1, 100);
+        mines_spin.set_increments (1, 1);
         mines_spin.value_changed.connect (mines_spin_cb);
         set_mines_limit ();