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/common/timerimpl.cpp

@@ -58,7 +58,7 @@ bool wxTimerImpl::Start(int milliseconds, bool oneShot)
     // let the caller know about it
 #if wxUSE_THREADS
     wxASSERT_MSG( wxThread::IsMain(),
-                  _T("timer can only be started from the main thread") );
+                  wxT("timer can only be started from the main thread") );
 #endif // wxUSE_THREADS
 
     if ( IsRunning() )