Normandy music mute in prologue if loading a save

[AudemusN7]

Describe the bug
In the prologue, if you load a save on the Normandy (pre-eden prime) the music doesn't play. This is because the music volume is only set to enable in the GAME_START sequence of NOR10_01_DS1.

To Reproduce
Load any save on the Normandy at the start of the game. The music will only trigger normally at the end of the first convo with Joker/Kaidan and never again.

Expected behavior
The music should be playing at any point while on the Normandy in the prologue, up until when it's designed to fade out once Joker chimes in for the eden prime distress call

Other Considerations
N/A

Game file
The music volume is stored in BIOA_PRO00, while the music volume is enabled in NOR10_01_DS1

I think the solution for this fix is to just put a check inside of PRO00.pcc on level load that enables the music volume if bool 3497 (Game Started) is true but bool 3494 (spoke to Nihlus in comm room) is false.

Putting the fix inside of the 01_DS1 file broadly fixes it but will still result in muted music if the player save/loads inside the comm room. So enabling the music volume via PRO00 is the neatest fix. Alternatively we can put the fix in both NOR10_01_DS1 and NOR10_04_DS1.