Sum the ascii values in a string.
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 Syntax

        GT_AsciiSum(<cStr>) --> nSum

 Arguments:

      <cStr>  - The string to sum

 Returns:

      nSum    - The sum of all ascii values in <cStr>.

 Description:

      Sum the ascii value of every character in the passed string
      and return the result.

 Examples:

 Source: ASCIISUM.C

 Author:  Andy M Leighton