Code25Checksum - handle final character of code 25 barcode as checksum
When True the toolkit will only report Code 25 barcodes where the last character is a valid checksum for the rest of the barcode. The toolkit expects a Code 25 checksum to be calculated using the following method:
Sum all of the even positioned characters (the right hand message character is always even), and multiply by 3.
Sum all the odd positioned characters.
Sum the totals from steps 1 and 2.
The checksum is the smallest number that when added to this sum results in a multiple of 10.
If the resulting number of characters is odd and you are using Interleaved Code 2 of 5 then add a leading 0 to the message data.
Default value: FALSE