Potion effects don't apply to the thrower when PvP is off

[benrobson]

It appears that when a player has PvP disabled, potions they throw (such as harming, poison, or weakness) do not affect themselves. This may be unintended behavior, especially in cases where the player is expecting splash or lingering potions to apply effects regardless of PvP state.

Steps to Reproduce:

1. Ensure the player has PvP turned off.

2. Throw a splash or lingering potion (e.g., Harming II) at your own feet.

3. Observe that the player is not affected by the potion.

Expected Behavior:

Players should be affected by their own thrown potions, regardless of their PvP status, unless explicitly intended otherwise by plugin design.