Update libs/exponential-histogram/src/main/java/org/elasticsearch/exponentialhistogram/ExponentialHistogramMerger.java

Co-authored-by: Kostas Krikellas <[email protected]>

Author: JonasKunz

libs/exponential-histogram/src/main/java/org/elasticsearch/exponentialhistogram/ExponentialHistogramMerger.java

@@ -118,7 +118,7 @@ public long ramBytesUsed() {
      */
     public ReleasableExponentialHistogram getAndClear() {
         assert closed == false : "ExponentialHistogramMerger already closed";
-        ReleasableExponentialHistogram retVal = result == null ? ReleasableExponentialHistogram.empty() : result;
+        ReleasableExponentialHistogram retVal = (result == null) ? ReleasableExponentialHistogram.empty() : result;
         result = null;
         return retVal;
     }