Cannot bulk field dress/bleed salmon

[NyarlathotepZERO]

Describe the bug

I had 5 salmon and was not able to get an option to do a bulk field dress/bleed of the corpses. I was able to to it for each corpse separately though. The Butcher all screen returns a 'has no organs' 'has no blood' but when butchering separately this is not the case as a liver was returned, and there was plenty of blood.

Steps To Reproduce

1. Drop all corpses on a butchering rack
2. Choose 'butcher everything' option [note that only options available are quick/full/quarter/dismember/dissect]

Expected behavior

Seeing as each of the Salmon were able to be field dressed/bled seperately, I would expect these options to be available as a 'butcher all' option.

Screenshots

The fish to butcher.

The 'butcher everything' screen [note:'has no organs' and 'has no blood']

showing the 5 fish available for butchering

showing the screen that is given when butchering a single fish [note all options available, aside from skin]

note the return products after field dressing the singular salmon

Versions and configuration

Platform : Windows_x64 Graphics : Tiles Build number : #11440 Build version: 0.E-9439-g1e8a075 Major version: 0.E

Additional context

none

[OliveChukar]

Tested on 0.E-9737-g511ddcb with core content pack dda only. The butchering options are missing when mass butchering every animal tested not just fish. The options are there when butchering one at a time.

[Night-Pryanik]

The culprit is in this code snippet: https://github.com/CleverRaven/Cataclysm-DDA/blob/fbd5ba72a3ee39f7f7387f89d2b4140c85d26fc7/src/game.cpp#L8415-L8434 In particular, in the check for index != -1 on line 8415. index of -1 is reserved for multibutchering, but for some reason skinning, field dressing, and bleeding are forbidden for multibutchering. I could remove check for index != -1 by myself, but I want to be sure that this check here is a mistake or oversight, and not an intended thing.