Fix compatibility with wxWidgets 3.0.x

- Use CanonicalName when GetCanonicalWithRegion() isn't available

common/font/fontconfig.cpp

@@ -19,12 +19,12 @@
  */
 
 
-#include <font/fontconfig.h>
 #include <pgm_base.h>
 #include <wx/log.h>
 #include <trace_helpers.h>
 #include <string_utils.h>
 #include <macros.h>
+#include <font/fontconfig.h>
 
 using namespace fontconfig;
 

common/pgm_base.cpp

@@ -783,7 +783,11 @@ wxString PGM_BASE::GetLanguageTag()
         return "";
     else
     {
+#if wxCHECK_VERSION( 3, 1, 6 )
         wxString str = langInfo->GetCanonicalWithRegion();
+#else
+        wxString str = langInfo->CanonicalName;
+#endif
         str.Replace( "_", "-" );
 
         return str;