openbor Tools

There were some errors in sin/cos tables for 16bit drawmethod.
Merged all those tables anyway to reduce the size of the exe a bit.

Minor change, prevent ai character from doing special to break a grab/slam in air.

Dummy aiflag walking to prevent crash.

Add code to make enemies walk a bit longer if they are returning form offscreen.

If level width equals to screen width, level position should be always increasing or it gets stuck unless the player stand beyond the center of the screen.

Level width should never be smaller than screen width.
Give obstacle default aimove and aiattack, for some mysterious reasons sometimes they are spawned moving (mostly script spawn).
Spawn dust before landframe update, to avoid conflicting with weaponframe.

Give bomb toss 0.5 extra starting height to prevent freezing in air bug.

Spawn dust before landframe update, just in case the frame is also a weaponframe.

Update aimove avoid, now they won't panic at the screen border.

Also pause sound effects when game paused.

Simplified AI code.

Fix a single pixel overflow loophole in drawmethod code (gfxshadow outside the screen).
For example, Golden Axe Legend saved civilian shows a single moving black pixel running across the screen.

Remove the filename_valid() function from borpak. Limiting the characters in
filenames is not something that should be handled during PAK creation.

Fixes packing of LeeBrother's Double Dragon Genesis mod.

Update kill_all function.
Should call clear_all_scripts after onkill script.