[SP] Fix animation events not playing for certain npc variants

[TwelveEyes]

The original code works off the assumption that NPC_type will always match the playerModel. This is okay for most cases, but obviously doesn't work for the stormtrooper variants (e.g. NPC_type stormtrooper2 does not match playerModel stormtrooper). Because of this, the variants do not get stormtrooper animevents applied to them. Passing along the NPC_type to G_ParseAnimationEvtFile to record as the modelIndex fixes this (NPC_type.handle() will then correctly equal the modelOnly short).

PR #1310 does not fix the issue, and in fact breaks the animevents for the non-variant stormtrooper.

Fixes #1287