Corristo can be asked to join the mages multiple times

[AmProsius]

Describe the bug
The player can ask Corristo to become a mage multiple times, even if he already met the level requirement before.

Expected behavior
Corristo's dialog option to become a mage now disappears when the player has already asked him before and met the level requirements.

Steps to reproduce the issue

1. Ask Corristo to become a mage.
2. Save the game.
3. Load the save.
4. Ask Corristo to become a mage again.

[AmProsius]

I'm not entirely sure about the solution, but this might work:

gothic-1-community-patch/scriptbase/_work/Data/Scripts/Content/Story/Missions/DIA_KDF_402_Corristo.d

Lines 98 to 105 in 1301413

	FUNC int KDF_402_Corristo_WANNBEKDF_Condition()
	{
	if ( (CorKalom_BringMCQBalls == LOG_SUCCESS) || Npc_KnowsInfo(hero,GRD_200_Thorus_WANNABEMAGE) )
	&& (Npc_GetTrueGuild(hero) == GIL_STT)
	{
	return TRUE;
	};
	};

changed to

FUNC int  KDF_402_Corristo_WANNBEKDF_Condition()
{
    if ( (CorKalom_BringMCQBalls == LOG_SUCCESS) || Npc_KnowsInfo(hero,GRD_200_Thorus_WANNABEMAGE) )
    && (Npc_GetTrueGuild(hero) == GIL_STT)
    && (Corristo_KDFAufnahme == 0)
    {
        return TRUE;
    };
};

[AmProsius]

Similar to #25.

[AmProsius]

Both the fix and the test have not been tested ingame yet.

[szapp]

I updated getting the symbols with the new functions. The test passes.