Changed cond_to_str to take a uint32, since unsigned numbers are only ever passed to it, and this can be a source of warnings for some compilers (also indexing an array without bounds checking a signed number is kind of iffy).
Involves making asserts use printf instead of the log functions (log functions are asynchronous and, as such, the log won't be printed in time)
As such, the log type argument was removed (printf obviously can't use it, and it's made obsolete by the file and line printing)
Also removed some GEKKO cruft.
