Patch to mips.h to silence sign compare warnings on Irix6

[Gavin Romig-Koch]

Kaveh R. Ghazi writes:
 > 2000-04-18  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 > 
 > 	* mips.h (BITS_PER_WORD, UNITS_PER_WORD, UNITS_PER_FPREG,
 > 	INT_TYPE_SIZE, LONG_TYPE_SIZE, POINTER_SIZE, POINTER_BOUNDARY,
 > 	PARM_BOUNDARY): Remove unnecessary casts.

Yes, this is OK, thanks.

                                                -gavin...