Initialize in-flight memory request counters

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DRAMSys/simulator/src/controller/scheduler/SMS.h

@@ -25,6 +25,7 @@ public:
       {
         memrequestcounter.emplace(Thread(threadID), 0);
         memoryIntensity.emplace(Thread(threadID), 0);
+        inFlightMemRequestCounter.emplace(Thread(threadID), 0);
       }
       SC_THREAD(batchScheduler);
     }