Making wxUSE_WEBKIT for optionally building wxWebKitCtrl.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@27629 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/html/webkit.h

@@ -16,6 +16,8 @@
 #pragma interface "webkit.h"
 #endif
 
+#if wxUSE_WEBKIT
+
 #if !defined(__WXMAC__) && !defined(__WXCOCOA__)
 #error "wxWebKitCtrl not implemented for this platform"
 #endif
@@ -127,4 +129,6 @@ END_DECLARE_EVENT_TYPES()
                             (wxWebKitStateChangedEventFunction) & func, \
                             (wxObject *) NULL ),
 
+#endif // wxUSE_WEBKIT
+
 #endif // _WX_WEBKIT_H_