Change the way the lua engine initialization functions are called

luprex/cpp/core/drivenengine.hpp

@@ -56,7 +56,6 @@
 class DrivenEngine;
 using UniqueDrivenEngine = std::unique_ptr<DrivenEngine>;
 using DrivenEngineMaker = UniqueDrivenEngine (*)(EngineWrapper *);
-using DrivenEngineInitializer = void (*)();
 
 
 class Channel : public eng::opnew {
@@ -134,6 +133,8 @@ public:
 
     static void print_usage(std::ostream &strm, std::string_view progname);
 
+    static void init_engine_wrapper(EngineWrapper *w);
+
     //////////////////////////////////////////////////////////////
     //
     // The following methods are the 'engine' side of the pipe.
@@ -320,7 +321,3 @@ struct DrivenEngineReg {
     } \
     DrivenEngineReg dengreg_##cname(name, dengmake_##cname);
 
-struct DrivenEngineInitializerReg {
-    static DrivenEngineInitializer func;
-    DrivenEngineInitializerReg(DrivenEngineInitializer f);
-};