fix(introspection): skip core zencode pseudo-scenario

Author: jaromil

src/zenroom.c

@@ -662,7 +662,9 @@ int zencode_get_statements(const char *scenario) {
 		"ZEN.if_steps = {}\n"
 		"ZEN.foreach_steps = {}\n"
 		"for _, v in ipairs(zencode_scenarios()) do\n"
-		"  if not SCENARIO then\n"
+		"  if v == 'zencode' then\n"
+		"    -- core parser module, not a loadable scenario extension\n"
+		"  elseif not SCENARIO then\n"
 		"    require_once('zencode_'..v)\n"
 		"  elseif SCENARIO == v then\n"
 		"    require_once('zencode_'..v)\n"