remove some of the GS_TIMEATTACK hacks I added because I now realise I can just turn titlemapinaction off when entering the menus \o/

* add gamestate != GS_TIMEATTACK checks to prevent Record Attack or NiGHTS Mode losing their backgrounds
* increase bgname to 9 to include the extra NULL byte? (is this a good idea actually)
* make M_IterateMenuTree ignore menu levels without a menutype value

Improved libopenmpt loading

See merge request STJr/SRB2Internal!251

Fix wall spikes that start retracted

See merge request STJr/SRB2Internal!255

Thinkerlists fix

Closes #161

See merge request STJr/SRB2Internal!253

Unmute wood debris

See merge request STJr/SRB2Internal!254

I know this isn't my branch, but found several reference haemmoragers and figured it'd be appropriate to commit here.

Fixed the thinkerlist issues by removing THINK_LIMBO. Delay-removed thinkers now stay in their list.

Also includes toaster's assorted fixes and improvements from target_painted_on_your_ass.

Egg Colosseum (CEZ3 remaster)

See merge request STJr/SRB2Internal!248

Sea Egg

See merge request STJr/SRB2Internal!244

Fixed mixed-code-and-declaration, shadowed variables, etc ...and the compiler doesn't like P_AddEachTimeThinker being inline anymore for some reason, oh well

# Conflicts:
#	src/p_mobj.c
#	src/sounds.c
#	src/sounds.h

PITY IN PINK and everything associated (formerly toast_fixes)

See merge request STJr/SRB2Internal!232

Metal Sonic Boss fixes (again)

See merge request STJr/SRB2Internal!245

Accidentially broke rain in the rainfixes branch (oh, the irony!)

See merge request STJr/SRB2Internal!249

Remove character flags

Closes #27

See merge request STJr/SRB2Internal!246

Sound options menu fixes

Closes #160

See merge request STJr/SRB2Internal!250

Hardcode CEZ brick debris

See merge request STJr/SRB2Internal!247

If you wanted the game to reset the item selected to the top option like before though, I left a line commented out that would do that for you. Unlike the old item = 0 way, it would automatically be corrected for headers and other spaces (thus kind of future-proofing this code)

Merge branch 'toast_cleanup' of https://git.magicalgirl.moe/STJr/SRB2Internal.git into toast_cleanup

# Conflicts:
#	src/p_mobj.c

# Conflicts:
#	src/p_enemy.c
#	src/p_mobj.c

Realised I accidentially broke rain in the rainfixes branch (oh, the irony!), realised it needed a few additional P_RecalcPrecipInSector calls to properly work with the new arena, and increased its speed.

If you must, I can cherrypick this into another branch - but it's required for this one, at least.