Fix misbehavior of TranslatableString::Format in Windows build...

... Make sure it doesn't try to capture this (quite unnecessarily!) but calls
the static overload of DoFormat.

Make other qualified calls too for added measure.

include/audacity/Types.h

@@ -387,13 +387,13 @@ public:
       (const wxString &str, Request request) -> wxString {
          switch ( request ) {
             case Request::Context:
-               return DoGetContext( prevFormatter );
+               return TranslatableString::DoGetContext( prevFormatter );
             case Request::Format:
             case Request::DebugFormat:
             default: {
                bool debug = request == Request::DebugFormat;
                return wxString::Format(
-                  DoFormat( prevFormatter, str, debug ),
+                  TranslatableString::DoFormat( prevFormatter, str, debug ),
                   TranslatableString::TranslateArgument( args, debug )...
                );
             }
@@ -499,14 +499,15 @@ private:
          (const wxString &str, Request request) -> wxString {
             switch ( request ) {
                case Request::Context:
-                  return DoGetContext( prevFormatter );
+                  return TranslatableString::DoGetContext( prevFormatter );
                case Request::Format:
                case Request::DebugFormat:
                default:
                {
                   bool debug = request == Request::DebugFormat;
                   return wxString::Format(
-                     DoChooseFormat( prevFormatter, str, plural, nn, debug ),
+                     TranslatableString::DoChooseFormat(
+                        prevFormatter, str, plural, nn, debug ),
                      TranslatableString::TranslateArgument( args, debug )...
                   );
                }

src/Internat.cpp

@@ -356,13 +356,13 @@ TranslatableString &TranslatableString::Join(
       -> wxString {
       switch ( request ) {
          case Request::Context:
-            return DoGetContext( prevFormatter );
+            return TranslatableString::DoGetContext( prevFormatter );
          case Request::Format:
          case Request::DebugFormat:
          default: {
             bool debug = request == Request::DebugFormat;
             return
-               DoFormat( prevFormatter, str, debug )
+               TranslatableString::DoFormat( prevFormatter, str, debug )
                   + separator
                   + arg.DoFormat( debug );
          }