Fixed all remaining samples/Unicode compilation errors.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@18241 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/ipc/client.h

@@ -37,7 +37,7 @@ private:
 class MyConnection: public wxConnection
 {
 public:
-    bool OnAdvise(const wxString& topic, const wxString& item, char *data, int size, wxIPCFormat format);
+    bool OnAdvise(const wxString& topic, const wxString& item, wxChar *data, int size, wxIPCFormat format);
     bool OnDisconnect();
 };