Can reload bullets directly into magazine while it's in the gun

# Describe the bug

Given a gun with a removable magazine, using `r`eload on the gun allows reloading bullets directly into the magazine, while it's in the gun.

# Steps To Reproduce

1. Get a gun, compatible magazine, and some bullets
2. Make the magazine partially empty, then load it into the gun
3. Select the gun and `r`eload - ammo is inserted directly into the installed magazine

# Expected behavior

It should be necessary to remove the magazine from the gun before reloading bullets into it.

# Screenshots

Here I have a Glock 21 with a 13-round magazine, with only 2 bullets left. I have 5 more bullets in my inventory:


When I `r`eload the gun, it puts bullets directly into the magazine:


# Versions and configuration

- OS: Linux
- OS Version: Distributor ID: Pop; Description: Pop!_OS 20.04 LTS; Release: 20.04; Codename: focal;
- Game Version: 0.E-8292-g00db780b75 [64-bit]
- Graphics Version: Tiles
- Game Language: System language []
- Mods loaded: [
Dark Days Ahead [dda],
Disable NPC Needs [no_npc_food],
Bionic Professions [package_bionic_professions]
]

# Additional context

This is closely related to the complementary bug #46122 which prohibits reloading the entire magazine from a gun, unless you remove the current magazine first. They may have the same cause, but the symptoms and use cases are different.