fix: wrong parameters in left shift when calculation duration

this closes tcunit#226

Author: stefanbesler

TcUnit/TcUnit/POUs/Functions/F_GetCpuCounterAs64bit.TcPOU

@@ -11,7 +11,7 @@ VAR_IN_OUT CONSTANT
 END_VAR]]></Declaration>
     <Implementation>
       <ST><![CDATA[CpuCounter();
-F_GetCpuCounterAs64bit := SHL(32, DWORD_TO_LWORD(CpuCounter.cpuCntHiDW)) + DWORD_TO_LWORD(CpuCounter.cpuCntLoDW);]]></ST>
+F_GetCpuCounterAs64bit := SHL(DWORD_TO_LWORD(CpuCounter.cpuCntHiDW), 32) + DWORD_TO_LWORD(CpuCounter.cpuCntLoDW);]]></ST>
     </Implementation>
   </POU>
 </TcPlcObject>