Turn NULL used as int to 0.
(Excluding chrome/browser/...)

Landing patch for Jacob Mandelson. Original review: http://codereview.chromium.org/195067

BUG=none
TEST=base_unittests & app_unittests

Review URL: http://codereview.chromium.org/267076

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@28810 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/renderer/render_widget.cc b/chrome/renderer/render_widget.cc
index 0d7fadf..0c5e9703 100644
--- a/chrome/renderer/render_widget.cc
+++ b/chrome/renderer/render_widget.cc
@@ -46,7 +46,7 @@
       webwidget_(NULL),
       opener_id_(MSG_ROUTING_NONE),
       render_thread_(render_thread),
-      host_window_(NULL),
+      host_window_(0),
       current_paint_buf_(NULL),
       current_scroll_buf_(NULL),
       next_paint_flags_(0),