line of fire works differently for monsters

Describe the bug

if the feral prepper enters any of the squares containing a red X it will be able to shoot the player but if the player tries to shoot back then you just hit the wall

Steps to reproduce

find a room somewhere, spawn a feral prepper outside of lof/los, make noise to have it investigate, get shot,

Expected behavior

i expect being able to shoot the feral if its able to shoot the player

Screenshots

No response

Versions and configuration

• OS: Windows
  • OS Version: 10.0.18362.1256 (1903)
• Game Version: 1cdaee9 [64-bit]
• Graphics Version: Tiles
• Game Language: System language []
• Mods loaded: [
  Dark Days Ahead [dda],
  Disable NPC Needs [no_npc_food],
  No Fungal Growth [no_fungal_growth],
  Bionic Professions [package_bionic_professions]
  ]

Additional context

No response

Reproduce the feral prepper scenario described in the issue: place it outside the player's line of fire and line of sight, make noise, and compare each side's ability to shoot through the marked squares. Trace the line-of-fire behavior for monsters and players, then verify that both sides agree on whether the shot is possible.