Adding fix for lvl1 intro music crouch delay when quicksave/load

[SergioMartin86]

Similar fix to that of feather fall for quickload/save

It remembers the time waited in crouching.

[NagyD]

Unfortunately I found some bugs in your changes:

• I get a warning here: suggest explicit braces to avoid ambiguous 'else'.
• The level 1 music is not played at all, and the prince does not wait before he stands up.
• If I turn on the new option in the settings, then the level 1 music is still not played at all, and the prince will keep crouching forever.