fHexAToDec

PURPOSE : Convert HEX value array to positive integer base 10 number.
SYNTAX : valueA:CharArray call fHexAToDec
RETURNS : Integer Positive integer base 10 value equivalent to passed in HEX array characters.
-1 on error.
EXAMPLES :
1B135 HEX array to positive integer
["1","B","1","3","5"] call fHexAToDec -> 110901

B0 HEX array to positive integer
["B","0"] call fHexAToDec -> 176

HISTORY : CoC bn880 06/03/2003
DEPENDENCIES: CoC_LIBNUMSYS