Merge pull request #9031 from mckellyln/hpcc-15945b

HPCC-15945 Thor slave hang in countproject

Reviewed-By: Jake Smith <jake.smith@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>

thorlcr/activities/countproject/thcountprojectslave.cpp

@@ -167,12 +167,12 @@ public:
     }
     virtual void stop()
     {
-        PARENT::stop();
         if (first) // nextRow, therefore getPrevCount()/sendCount() never called
         {
             prevRecCount = count = getPrevCount();
             signalNext();
         }
+        PARENT::stop();
     }
     virtual void abort()
     {