engine: print warning to console when loading maps that contain extra data appended to the end of the file

I think TekWar is the only game that did this, but it's worth detecting since it means even simply re-saving those maps without purposeful changes will break them.

Note that this does not fix the player input issue.

engine: change first argument passed to clipinsidebox() to pass by value instead of a ptr, remove separate clipinsidebox() implementation in favor of clipinsideboxline()

engine: fix clipping issue where the player could get squished between a 2-sided blocking wall sprite and a wall in rare instances

Shut up, VS debugger.

Fix undefined behavior/potential OOB access in ST_21_FLOOR_DOOR. g_AnimateGoal does not take a sector number, it takes an animation index, and caps at 1024, not 4096.

Added seed_krand(int32_t* seed), a function for performing RNG that reads from and writes to a custom seed pointer.

Jordon Moss authored Feb 02, 2021 and Evan Ramos committed Mar 18, 2021

Move S_DefineSound, S_DefineMusic, and S_DefineAudioIfSupported out of game.cpp and into sounds.cpp, and made CON_DEFINESOUND use S_DefineSound, reducing code duplication.

Fixes assertion failure with Suburbs TC.

Jonathon Fowler authored Jan 31, 2021 and Evan Ramos committed Jan 30, 2021

The song should play once before returning to the menu, so the 'loop'
parameter needs to be honoured within PlaySong() too.

Fixes #35

The cfg file should reflect the user's preferences even if the features
don't take effect. The cvars' descriptions document the incompatibility
that is happening.

- r_texfilter
- r_anisotropy
- r_useindexedcolortextures

I hit an assertion at 64.

It is an optional part of xxHash we are not using that breaks the build
everywhere but x86*.

VS: fix "C1083: Cannot open compiler generated file" error with polymost1Frag.glsl.cpp and polymost1Vert.glsl.cpp

I'm not entirely happy with this due to the addition of the extra filter in the IDE to hold the generated files, but it's better than having to hit build twice in order to get a successful compilation.