Slide panning doesn't emulate correctly

[ChrisBlueStone]

[E2 60 00] [30 7B] A1 [E1 14] [60] C8 this series of commands emulate differently between ebmused and in-game.

Current behavior

Ebmused will pan the note towards the right speaker for 0x30 ticks before jumping to the left speaker (E1 14) and continuing the slide for 0x30 more ticks until it's about in the center again and then jumps straight to the right speaker (the end value of the E2 command) when the slide ends.

Expected behavior

In-game, the slide continues for the remainder of the duration of the E2 command as it does in ebmused, but when the slide ends, the pan does not jump to 00 the end value of the E2 slide command but remains at whatever value it happened to be when the slide ends.