Modified vefn_CanTransitionBeCreated to allow transitions to a step with no applicability

PROMS/DataLoader/PROMSFixes.Sql

@@ -5540,7 +5540,7 @@ AS BEGIN
 	union
 	select * from vefn_SplitInt([dbo].[ve_GetItemDerivedApplicability](@toID),',')
 	) ah
-	if @tCount >= @uCount begin
+	if (@tCount = 0) or (@tCount >= @uCount) begin
 		set @rv = 1
 	end
 	return @rv