Removed all remaining traces of VID_X11 code in hw_drv.h and hw_data.h, the macro is no longer used by Linux etc versions of SRB2.

Unlike the rest of the commits in this branch (as of writing), I didn't make this commit between 1 and 2 years ago, I made it right now ;)

Remove pointless drawtextured variable and redundant fake planes checks (R_FakeFlat would already have made gr_frontsector/backsector something else if they were)

Added missing checks in HWR_AddLine from the software version, move v** vars to the top since R_PointToAngle calls use the same values anyway

this fixes a crash in (old) GFZ2 at the ramp as a result of creating pv1/pv2. This probably means before pv1/pv2 there could have been some silly typecasting from vertex_t to polyvertex_t to get fixed vertex coords and such...

Yes I know they're void * in r_defs.h's seg_t definition, it's quicker than trying to figure out if including hardware/hw_glob.h is a good idea or not

I also optimised those two functions while I was there (why keep a "floating" variable when setting it to false guarantees the functions return false?)

gr_correcttricks fix: don't check if top/bottom textures are missing for sloped sectors, just ignore and cancel the hack

This fixes GFZ2's mysterious flying flats at the ramp to the big room

Add MD2_INDENT and MD2_VERSION so we can cleanly check that it's a valid MD2 from magic number/version

mapheader lua unarchive hotfix

See merge request !302

Music Code Cleanup

See merge request !278

Handle fix for SDL Mixer

See merge request !301

More accurate GIF delay

See merge request !276

MI's unimportant code cleanup

See merge request !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?)

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

See merge request !292

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

Free SOC_s to a good home

See merge request !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 !288

SP savegame continues icon crash

See merge request !290

Makefile: Split zlib and libpng

See merge request !285

Fixer mixer: Mixer Memory Leaks

See merge request !287

Weather is already run client-side. What if we ran it render-side, for major performance gains? This commit will answer all your questions - and more!

A value of 1 in freesrc for Mix_LoadWAV_RW and Mix_LoadMus_RW calls SDL_RWclose on the RWops anyway.
For Mix_LoadWAV_RW the RWops is freed right after the data is loaded (because it makes a copy of the data in memory)
For Mix_LoadMUS_RW the RWops is freed when Mix_FreeMusic is called (because the data is not a copy)
So setting 1 on freesrc doesn't actually free the RWops immediately on Mix_LoadMus_RW *unless* it failed to load any music.