Updated log date timespan to only show changes in this version

DittoSetup/BuildDitto.bld

@@ -2923,7 +2923,7 @@ var sc_security="b3f57099";
 		</step>
 		<step action='Git'>
 			<Command>log</Command>
-			<Options>--pretty=format:"%%ad %%s" --date=short   --since=2018-09-04</Options>
+			<Options>--pretty=format:"%%ad %%s" --date=short   --since=2018-12-23</Options>
 			<WorkDir>%workDir%</WorkDir>
 			<buildfailsteps type='11'>0</buildfailsteps>
 			<indent type='3'>2</indent>