Fix handling for automation debug formatting errors

One spot was missed when converting stuff over to using error_Tag rather
than lua_error for stack unwinding on errors.

src/auto4_lua_progresssink.cpp

@@ -175,7 +175,7 @@ namespace Automation4 {
 				luaL_where(L, 1);
 				lua_insert(L, 1);
 				lua_concat(L, 2);
-				lua_error(L);
+				throw error_tag{};
 			}
 		}