scala style fix

Author: yingjieMiao

core/src/main/scala/org/apache/spark/rdd/AsyncRDDActions.scala

@@ -85,7 +85,8 @@ class AsyncRDDActions[T: ClassTag](self: RDD[T]) extends Serializable with Loggi
             numPartsToTry = partsScanned * 4
           } else {
             // the left side of max is >=1 whenever partsScanned >= 2
-            numPartsToTry = Math.max((1.5 * num * partsScanned / results.size).toInt - partsScanned, 1)
+            numPartsToTry = Math.max(1, 
+              (1.5 * num * partsScanned / results.size).toInt - partsScanned)
             numPartsToTry = Math.min(numPartsToTry, partsScanned * 4) 
           }
         }