* Add entity type attribute checks to getcrewman()
This means that the game is no longer able to target other non-crewmate
entities when it looks for a crewmate.
This has actually happened in practice. A command like
position(cyan,above) could position the text box above a horizontal warp
line instead of the intended crewmate.
This is because getcrewman() previously only checked the rule attributes
of entities, and if their rule happened to be 6 or 7. Usually this
corresponds with crewmates being unflipped or flipped, respectively.
But warp lines' rules overlap with rules 6 and 7. If a warp line is
vertical, its rule is 5, and if it is horizontal, its rule is 7.
Now, usually, this wouldn't be an issue, but getcrewman() does a color
check as well. And for cyan, that is color 0. However, if an entity
doesn't use a color, it just defaults to color 0. So, getcrewman() found
an entity with a rule of 7 and a color of 0. This must mean it's a cyan
crewmate! But, well, it's actually just a horizontal warp line.
This commit prevents the above from happening.
There are two main problems with flipgravity():
1. It doesn't work for an already-flipped crewmate.
2. It doesn't work on the player.
This commit addresses both of those issues.
Info Teddy