- Many fixes to the four circle codes during taking the new code into

operation.
- Fixed some missing output
- Second generation histogram memory and velocity selector objects
- Fixed a problem in diffscan

diffscan.c

@@ -303,6 +303,7 @@ static int DiffScanTask(void *pData)
   status = GetDrivablePosition(pVar->pObject, self->scanObject->pCon,
                                &fPos);
   if (status == 0) {
+	ReleaseCountLock(pCount->pCountInt);
     return finish;
   }
   AppendScanVar(pVar, fPos);
@@ -354,6 +355,10 @@ static int DiffScanTask(void *pData)
     finish = 0;
   }
 
+  if(finish == 0) {
+	  ReleaseCountLock(pCount->pCountInt);
+  }
+  
   return finish;
 }