NPCs with Langourus get movespeed bonus.

[Dacendeth]

Describe the bug

If a npc has Languorous they receive a pretty sizable bonus to move speed. My guess is it's not properly updating and their current stamina is above their max stamina causing a speed bonus.

Steps To Reproduce

Spawn an npc, check his current move cost and then mutate him with Languorous and watch his move cost improve and stay improved.

Expected behavior

For a negative trait of poor stamina to not make my companion run faster.

Screenshots

Versions and configuration

• OS: Windows
  • OS Version: 10.0 1903
• Game Version: 0.E-1373-gdcc42a9 [64-bit]
• Graphics Version: Tiles
• Game Language: System language []
• Mods loaded: [
  Dark Days Ahead [dda],
  Disable NPC Needs [no_npc_food]
  ]

Additional context

[anothersimulacrum]

If stamina is the case, then something is wrong with Character::get_stamina_max().
In npc::process_turn(), the stamina is set to get_stamina_max() every minute if their stamina is less than the value returned by get_stamina_max().

https://github.com/CleverRaven/Cataclysm-DDA/blob/master/src/npc.cpp#L2783-2785
This is get_stamina_max() for reference. It should be accounting for mutation stamina modifiers.
https://github.com/CleverRaven/Cataclysm-DDA/blob/master/src/character.cpp#L7237-L7244

[Dacendeth]

Well I can tell you if you mutate them to have more max stamina, they will be initially slowed but will regenerate their stamina up to their new max, and interestingly if you mutate them to languorous after that they will be even faster.