1. a couple of compilation warnings fixed (strconv/listctrl)

2. now reenable windows disabled by wxWindowDisabler slightly earlier:
   this solves the problem with "wrong" window being brought to top and
   eliminates the need for BringWindowToTop() and SetActiveWindow() in
   our code
3. style wxFRAME_FLOAT_ON_PARENT is now obsolete and unused, all frames
   have WS_EX_APPWINDOW style and appear on the taskbar


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@8487 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/strconv.cpp

@@ -87,6 +87,8 @@ WXDLLEXPORT_DATA(wxMBConv *) wxConvCurrent = &wxConvLibc;
 
 #if wxUSE_WCHAR_T
 
+#ifdef WC_UTF16
+
 static size_t encode_utf16(wxUint32 input,wxUint16*output)
 {
   if (input<=0xffff) {
@@ -119,6 +121,8 @@ static size_t decode_utf16(wxUint16*input,wxUint32&output)
   }
 }
 
+#endif // WC_UTF16
+
 // ----------------------------------------------------------------------------
 // wxMBConv
 // ----------------------------------------------------------------------------