Run action_dice_roll_odds() only when relevant
The function action_prob_pre_action_dice_roll() will only use the result of is_effect_val_known() when the value of EFT_ACTION_ODDS_PCT is known.
Patch by Hilde Bye
The function action_prob_pre_action_dice_roll() will only use the result of is_effect_val_known() when the value of EFT_ACTION_ODDS_PCT is known.