Not reloading when FCNPC_ToggleInfiniteAmmo

[WoutProvost]

The NPC doesn't perform the reloading animation when FCNPC_ToggleInfiniteAmmo is toggled on. This makes it seem like the NPC has an infinitesimally large clip, which looks stupid.

The NPC should still empty his magazine, then reload, then continue to shoot.

Mentioned in this thread post.

[WoutProvost]

Possible fix in this commit and this commit.

Again, some data I came up with:

Update infinite ammo situations

Ammo	Clip size	Result
60	17	ammo = 19, add 2 to prevent UpdateWeaponState call
0	17	ammo = 19, add 2 to prevent UpdateWeaponState call
16	17	ammo = 19, add 2 to prevent UpdateWeaponState call
60	2	ammo = 4, lowest possible clip size to pass checks is 2, then add 2 again

Fill clip infinite ammo situations

Ammo	Ammo in clip	Clip size	Result
19	10	17	nothing, because clip not empty
19	0	17	ammo in clip = 17

Reload infinite ammo situations

Ammo	Ammo in clip	Clip size	Result
18	16	17	don't reload, because clip not empty
18	0	17	reload
3	0	2	reload

[WoutProvost]

Implementation depends on #71.

EDIT:
Looks like I've misunderstood the meaning of weapon states, in that case, my last commit is not really necessary.