Fixes projectile quantity when dropped

[Protuhj]

If you dropped a non-full stack of projectiles, when you picked it up again, the stack would re-fill.

[danhp]

I'm not sure if this changed anything.
I still get inconsistent drop amounts.

EDIT: This works fine but not with cheats (money and the shopping or even the straight up cheat)
i'm guessing shopping is not giving the correct items.

so technically mergeable as is. we have to create separate issues for the shopping

[CalebJohn]

I'm not going to be able to test until later tonight but since these are related, @Protuhj do you think this could be adjusted to fix #1570 as well?

[Protuhj]

I won't be able to test this further until Sunday. If you want to expand on
this to address the stacked items, feel free.

[CalebJohn]

@Protuhj @daniwa I don't think it's related to cheats I think its the way the blacksmith gives items but this definitely only works sometimes.

[danhp]

works great!
if you push this fix to weapons, it's ranged counterpart and scrolls, you'll also get #1570 in one go

[CalebJohn]

LGTM
and I must say I am a fan of the comments

[Protuhj]

Let's get another developer to test and sign off on this so we can merge it.