Cosa è cambiato in EDuke32, build per build

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

This is to not slow down the core drawing functions too much in debugging builds and mimics the way things are on x86.

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.

Also, - don't strip const when passing the char ptr to it and a couple more instances in game.c - use g_netPort when -connect parameter doesn't have a port suffix (":XXXX"), so that e.g. eduke32 -port 1700 -connect localhost is the same as eduke32 -connect localhost:1700 (-port must come before -connect, unfortunately.)

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.

These are element indices for a while now. Also eliminate some dead code afterwards.

r2727 made old savegames incompatible, as an array with MAXVOLUMES*MAXLEVELS is saved in Gv_WriteSave().

(LUNATIC build only.) Also, a minor problem is identified. sizeof(actor_t) is 124 on 64-bit platforms, while the expected size is 128 bytes. This needs to be corrected whenever the next savegame version bump happens.

This introduces a Makefile variable EDUKE32_MY_DEVELOPER_ID, which is expected to come from the environment, so that minor disagreements/ preferences can be handled -- don't let it go overboard though! -- to keep the working directory clean of stuff that one doesn't actually work on. My ID is 805120924, i.e. "helix".

Also, print failure messages on some occasions.

Usage is from 3D mode only. When a sector (or wall) is committed to the clipboard, it (or the wall's sector) is saved, and is subsequently used when auto-aligning [;-ENTER] another sector's ceiling or floor against the reference one's. This temp. sector is reset on any structurally modifying operation except setting first walls; also, aligning extended ceilings or floors is impossible as they use .*xrepeat internally. The auto-alignment does not change picnums (this can be accomplished with the ['+ENTER] combination), but copies the orientation bits 2^{2..6} to the alignee. Afterwards, if the reference is relative-aligned, it tweaks them, so that every case where the two firstwalls are either parallel or perpendi- cular is handled correctly. It does not yet calculate the panning values.

This is so that people know where to enable it. One day, all these debugging switches ought to go into the Makefiles in one form or another.

Also factor out the code (2x) setting the alignment bits for sprites.