Make sure handles of files opened by W_LoadWadFile are closed if we abort loading the files for whatever reason.

ESPECIALLY if the file is already loaded in SRB2, that's just silly.

Patch offsets fix

See merge request STJr/SRB2!305

MI minor refactoring

See merge request STJr/SRB2!294

Multi-patch texture support for transparency AND translucency

See merge request STJr/SRB2!293

now that V_FLIP's effects are always supported in V_DrawFixedPatch, there's no need for the "flip" variable anymore

HWR_DrawFixedPatch: Add V_OFFSET support for V_FLIP in hardware code as well, also add missing SHORTs for gpatch fields

Make V_OFFSET no thing without V_NOSCALESTART, to remove any potential glitches with using it on its own

mapheader lua unarchive hotfix

See merge request STJr/SRB2!302

Music Code Cleanup

See merge request STJr/SRB2!278

Handle fix for SDL Mixer

See merge request STJr/SRB2!301

More accurate GIF delay

See merge request STJr/SRB2!276

MI's unimportant code cleanup

See merge request STJr/SRB2!295

I've voided this out on other sound interfaces than SDL Mixer ones because I'm both not sure whether they need it, and not sure how to make them work with it if they do.

Remove "playerdeadview" variable; it's not been used for its stated purpose for who knows how long now

Besides rankings popping up when you die just sounds weird anyway, maybe I'm just used to SRB2 not doing it I guess

Remove unused ObjectPlace_OnChange prototype (from when Objectplace was a consvar, which it is not anymore)

Also corrected what appears to be a typo in some comments above?

(it's only set to 0 in software, and only ++'d in OpenGL, what kind of sense does that make?)

Add R_Draw2sMultiPatchTranslucentColumn_8, for columns of multi-patch textures used as midtextures on two-sided linedefs with both transparency AND translucency

...that was a mouthful

Tiny fix so that joystick2 being closed can let the JoystickSubSystem close before game close.

See merge request STJr/SRB2!292

No memory leak here, just a very tiny thing I noticed.

Free SOC_s to a good home

See merge request STJr/SRB2!291

* Fix a memory leak regarding implementation of SOC_ (improperly copypasted code from LUA_LoadLump!!)
* Optimise the repeated strlen usage into a single call, which is stored for later.

Dr. Who And The Sleeping Weather

See merge request STJr/SRB2!288

SP savegame continues icon crash

See merge request STJr/SRB2!290

Makefile: Split zlib and libpng

See merge request STJr/SRB2!285