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/palette.h

@@ -25,7 +25,7 @@ class WXDLLIMPEXP_CORE wxPaletteBase: public wxGDIObject
 public:
     virtual ~wxPaletteBase() { }
 
-    virtual int GetColoursCount() const { wxFAIL_MSG( _T("not implemented") ); return 0; }
+    virtual int GetColoursCount() const { wxFAIL_MSG( wxT("not implemented") ); return 0; }
 };
 
 #if defined(__WXPALMOS__)