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

include/wx/dynload.h

@@ -71,7 +71,7 @@ public:
     void  RefObj() { ++m_objcount; }
     void  UnrefObj()
     {
-        wxASSERT_MSG( m_objcount > 0, _T("Too many objects deleted??") );
+        wxASSERT_MSG( m_objcount > 0, wxT("Too many objects deleted??") );
         --m_objcount;
     }