What changed in EDuke32, build by build

It's time to replace some int32s with 64-bit ints in core engine functions. The problem is that for example, the dot product is taken between vectors that may be the difference between two arbitrary points in a sector, so even if one sticks to the "no blue walls" rule, that doesn't guarantee freedom from overflows.

This was exposed by Clang with -ftrapv, which apparently also traps those.

Those were happening when wall drawing in an upper/lower layer "closed" too much of the "curtain" (umost/dmost) for subsequent drawing in that portal. Example: looking down the sewer manhole at the beginning of Retaliation will now render without HOM.

This was supposed to go into the last commit, but I did git commit --amend without adding the changes to the index. Now I'm too lazy to sort things out.

The GAMESTATE one has to be carried out twice, first on the data from xd3_encode_memory, and then with the compressed data (because it might have increased in size, though this is very unlikely). The MOVE check is similar, though there, failure of the first check implies corrupt memory (which is why we're Bassert'ing that condition). Currently, the overflow on GAMESTATE sending happens when switching to a different map.

This fixes the glitches/corruption whereever showview is used from EVENT_DISPLAYROOMS while the scene is actually rendered to a tile instead of the frame buffer, for example because we have a tilted view or "pixel doubling" enabled. Fixing it for real (i.e. so that the showview actually completes) will require more effort.

This fixes the crash on Wii when looking sidewards (e.g. when dying), but makes the tilted view look more pixelated. The problem was that an attempt was made to render onto a 640x640 tile for the rotated view, but the base engine arrays were too small for that.

Also, correct the loadboard() return value checks in premap.c to be aware of a returned -2 ("wrong map version").

They were broken by r2666, which made their elements intptr_t instead of int32_t, but this change was not reflected in related allocation code. WARNING: players on 64-bit platforms should not attempt to load games saved with r2665 or earlier.

Note: You may encounter a crash if you try to test your map and Mapster32 is running fullscreen.

The default C99 mode is giving us linking errors from xdelta3.

Those sprites are usually decorative, and certainly not enemies!