(look_for_fraction): Patch from Orn Hansen.

(look_for_fraction): Patch from Orn Hansen.
(getmonth): Compare the two month names only to the length of the
string in the month table.  Patch from Orn Hansen.
(NLS_STRNCMP): New macro.
(strncoll_s2_readonly): New function.
(inittables): Don't use temporary `comp' to hide type of comparator function.
(nls_sort_month_comp): Declare parameters to be void* to match
comparator function type required for qsort.
(getmonth): Use NLS_STRNCMP rather than #ifdef.
Use do-while, rather than while-loop.