Fix for strcoll
Stewart Brodie authored
Detail:
  Somebody had modified the SWI call to Territory_Collate to be done
    via _swix instead of _kernel_swi, but didn't remove the _kernel_swi_regs
    variable (r) and didn't change the function return value to return the
    new "ret" variable instead of r.r[0] which gives arbitrary results - in
    particular it confuses qsort.
Admin:
  Tested that it builds.

Version 4.97. Tagged as 'RISC_OSLib-4_97'
e6cf1730