Globally replace _T() with wxT().

Standardize on using a single macro across all wxWidgets sources and solve the name clash with Sun CC standard headers (see #10660).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61508 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/os2/textctrl.cpp

@@ -718,7 +718,7 @@ void wxTextCtrl::MarkDirty()
         ::WinSendMsg(GetHwnd(), MLM_SETCHANGED, MPFROMLONG(TRUE), 0);
     else
         // EM controls do not have a SETCHANGED, what can we do??
-        wxFAIL_MSG( _T("not implemented") );
+        wxFAIL_MSG( wxT("not implemented") );
 }
 
 //