[SE-1693] ADH - Change Accumulator block to output empty rather than 0 when there are no inputs
Product Line:	P&C
Component/s:	Other
Fix Version/s:	SICS 4.9.3 SICS 4.9.2 SSP3

Aim of function
Changing the ADH Accumulator block so it outputs empty rather than 0 when there are no inputs, and also after being reset.

System Parameters Affected
None.

Existing functionality affected
Automated Document Handling.