Add missing lines to setup.h.in. This properly fixes compilation under configure based environments. Also update the include guards for the wxWebHistoryItem files.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/SOC2011_WEBVIEW@68477 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/webview_ie.h

@@ -12,7 +12,7 @@
 
 #include "wx/setup.h"
 
-#if wxUSE_WEBVIEW_IE
+#if wxUSE_WEBVIEW_IE && defined(__WXMSW__)
 
 #include "wx/control.h"
 #include "wx/webview.h"
@@ -243,6 +243,6 @@ private:
     wxWebHandler* m_handler;
 };
 
-#endif // wxUSE_WEBVIEW_IE
+#endif // wxUSE_WEBVIEW_IE && defined(__WXMSW__)
 
 #endif // wxWebViewIE_H