[9fans] Compiler bug

[Julius Schmidt]

I have found what I believe to be a compiler bug: Comparing an int to a 
u16int causes the int to be cast to unsigned int, instead of the u16int 
being promoted to int and then compared (as I would argue the C89 
standard specifies).
As a result -1 < u is false for any u16int u. Or is this intended behaviour?
I have verified that 8c exhibits the bug, but have not checked the other 
compilers.
gcc does not seem to have this bug.

Julius Schmidt