[TF2] fix miniguns not spinning or spinning very slowly outside of first-person

[wgetJane]

fixes a bug introduced by a recent patch: #845 (comment)

fixes ValveSoftware/Source-1-Games/issues/7636

(i tested behaviours before that patch, after that patch, and after this patch)

note to other contributors submitting prediction-related fixes:

prediction->IsFirstTimePredicted() should only be used alone if you're sure that it's always called in prediction

because it always returns false outside of prediction

otherwise check for prediction->InPrediction() first

[wgetJane]

to be clear, "third-person" here means the miniguns on other players, not on your own player (using the thirdperson command)

[Marioiscool246]

I originally thought this was only related to the barrel movement on the viewmodel, since it didn't have the spin speed stuff going on in thirdperson. I am still new to source engine stuff so thanks for pointing this out :)

[wgetJane]

I originally thought this was only related to the barrel movement on the viewmodel, since it didn't have the spin speed stuff going on in thirdperson. I am still new to source engine stuff so thanks for pointing this out :)

yeah thats fair, it's not exactly well-documented at all