fixes for the compilation warnings with Sun CC:

1. some fixes for "String literal to char * conversion" warnings (many
   more left in the *.xpm files)
2. fixes for "assignment of function to extern "C" function"
3. a few other miscellaneous ones


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13478 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/db.cpp

@@ -3721,8 +3721,10 @@ int WXDLLEXPORT wxDbConnectionsInUse(void)
 
 /********** wxDbLogExtendedErrorMsg() **********/
 // DEBUG ONLY function
-const wxChar WXDLLEXPORT *wxDbLogExtendedErrorMsg(const wxChar *userText, wxDb *pDb,
-                             wxChar *ErrFile, int ErrLine)
+const wxChar WXDLLEXPORT *wxDbLogExtendedErrorMsg(const wxChar *userText,
+                                                  wxDb *pDb,
+                                                  const wxChar *ErrFile,
+                                                  int ErrLine)
 {
     static wxString msg;
     msg = userText;