getfmth - get month names
Getfmth returns a pointer to an array of 12 character pointers.
Each of these pointers point to a null terminated string
corresponding to the names of each month in the year (January
The month names are retrieved from the country format structure
C/Base Reference Manual Chapter 13, "Formatting Data Values"
Getfmth is used instead of getfmonth to avoid possible name
conflicts with getfmoney.