only printout if interval is positive (#1421)

Author: baltzell

common-tools/clas-utils/src/main/java/org/jlab/utils/benchmark/ProgressPrintout.java

@@ -55,14 +55,14 @@ public void showStatus(){
     }
 
     public void updateStatus(){        
-        if (++this.numberOfCalls < WARMUP_CALLS) {
+        if (++this.numberOfCalls < WARMUP_CALLS){
             this.previousPrintoutTime = System.currentTimeMillis();
             this.startPrintoutTime = this.previousPrintoutTime;
         }
-        else {
+        else if(this.printoutIntervalSeconds > 0){
             Long currentTime   = System.currentTimeMillis();
             Double elapsedTime = (currentTime - this.previousPrintoutTime)*1e-3;
-            if(elapsedTime >= this.printoutIntervalSeconds){
+            if(elapsedTime >= this.printoutIntervalSeconds) {
                 this.previousPrintoutTime = System.currentTimeMillis();
                 System.out.println(this.getUpdateString());
             }