Add a global return_success() method implementation

src/libcharon/sa/ikev2/tasks/ike_dpd.c

@@ -37,12 +37,6 @@ METHOD(task_t, return_need_more, status_t,
 	return NEED_MORE;
 }
 
-METHOD(task_t, return_success, status_t,
-	private_ike_dpd_t *this, message_t *message)
-{
-	return SUCCESS;
-}
-
 METHOD(task_t, get_type, task_type_t,
 	private_ike_dpd_t *this)
 {
@@ -82,11 +76,11 @@ ike_dpd_t *ike_dpd_create(bool initiator)
 	if (initiator)
 	{
 		this->public.task.build = _return_need_more;
-		this->public.task.process = _return_success;
+		this->public.task.process = (void*)return_success;
 	}
 	else
 	{
-		this->public.task.build = _return_success;
+		this->public.task.build = (void*)return_success;
 		this->public.task.process = _return_need_more;
 	}
 

src/libstrongswan/utils/utils.c

@@ -386,6 +386,14 @@ status_t return_failed()
 	return FAILED;
 }
 
+/**
+ * returns SUCCESS
+ */
+status_t return_success()
+{
+	return SUCCESS;
+}
+
 /**
  * nop operation
  */

src/libstrongswan/utils/utils.h

@@ -495,6 +495,11 @@ bool return_false();
  */
 status_t return_failed();
 
+/**
+ * returns SUCCESS
+ */
+status_t return_success();
+
 /**
  * Write a 16-bit host order value in network order to an unaligned address.
  *