* config/tc-vax.c (tc_aout_fix_to_chars): Local variable NBYTES_R_LENGTH now

* config/tc-vax.c (tc_aout_fix_to_chars): Local variable NBYTES_R_LENGTH now
const.

* config/obj-*.c, config/tc-*.c: Omit superfluous "return" statements at ends
of functions.  Don't check for null return from hash_new, since it won't return
at all if there's no memory available.  Also, check for null return from
hash_insert, rather than zero-length string, as success indicator.