Advanced Throwing - Fix multiple round grenades

[johnb432]

When merged this pull request will:

• Grenades with multiple rounds (e.g. SOG's vn_v40_grenade_mag) would not behave nicely with advanced throwing, which was hard coded to only handle grenades with 1 round.

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[diwako]

Tried it out.
It works if you do not switch the grenade while having the nade preview.

If you throw a grenade from a magazine that has a more than 1 ammo, then switch the grenade mag, preview again, switch a few more times then until you get back to the grenade magazine with more than 1 ammo and then throw again, then the magazine suddenly is full again and only 1 grenade as subtracted.

There is also some strange occurrences of no grenades being removed from the magazine, but that is a bit too inconsistent to reproduce.

All of the wrong behavior has something to do with switchen the selected grenades.

[Timi007]

I just posted issue #10493. Does this PR also handle canceling the throw correctly?

[diwako]

I just posted issue #10493. Does this PR also handle canceling the throw correctly?

As long as the grenade is not primed or thrown no ammo will be deducted.