Reflection: Copy invoke function also in the variadic case

It doesn't matter how the parameters are provided, we always have
to copy the trampoline invoke function.

ext/reflection/php_reflection.c

@@ -3332,13 +3332,11 @@ static void reflection_method_invoke(INTERNAL_FUNCTION_PARAMETERS, int variadic)
 	fcc.called_scope = intern->ce;
 	fcc.object = object ? Z_OBJ_P(object) : NULL;
 
-	if (!variadic) {
-		/*
-		 * Copy the zend_function when calling via handler (e.g. Closure::__invoke())
-		 */
-		if ((mptr->internal_function.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE)) {
-			fcc.function_handler = _copy_function(mptr);
-		}
+	/*
+	 * Copy the zend_function when calling via handler (e.g. Closure::__invoke())
+	 */
+	if ((mptr->internal_function.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE)) {
+		fcc.function_handler = _copy_function(mptr);
 	}
 
 	result = zend_call_function(&fci, &fcc);