Wrong exception thrown if capacity<=0

Encountered this in a very large query:

Caused by: java.lang.AssertionError: Capacity must be a power of two

       at org.apache.hadoop.hive.ql.exec.vector.mapjoin.fast.VectorMapJoinFastHashTable.validateCapacity(VectorMapJoinFastHashTable.java:60)

       at org.apache.hadoop.hive.ql.exec.vector.mapjoin.fast.VectorMapJoinFastHashTable.<init>(VectorMapJoinFastHashTable.java:77)

       at org.apache.hadoop.hive.ql.exec.vector.mapjoin.fast.VectorMapJoinFastBytesHashTable.<init>(VectorMapJoinFastBytesHashTable.java:132)

       at org.apache.hadoop.hive.ql.exec.vector.mapjoin.fast.VectorMapJoinFastBytesHashMap.<init>(VectorMapJoinFastBytesHashMap.java:166)

       at org.apache.hadoop.hive.ql.exec.vector.mapjoin.fast.VectorMapJoinFastStringHashMap.<init>(VectorMapJoinFastStringHashMap.java:43)

       at org.apache.hadoop.hive.ql.exec.vector.mapjoin.fast.VectorMapJoinFastTableContainer.createHashTable(VectorMapJoinFastTableContainer.java:137)

       at org.apache.hadoop.hive.ql.exec.vector.mapjoin.fast.VectorMapJoinFastTableContainer.<init>(VectorMapJoinFastTableContainer.java:86)

       at org.apache.hadoop.hive.ql.exec.vector.mapjoin.fast.VectorMapJoinFastHashTableLoader.load(VectorMapJoinFastHashTableLoader.java:122)

       at org.apache.hadoop.hive.ql.exec.MapJoinOperator.loadHashTableInternal(MapJoinOperator.java:344)

       at org.apache.hadoop.hive.ql.exec.MapJoinOperator.loadHashTable(MapJoinOperator.java:413)

       at org.apache.hadoop.hive.ql.exec.MapJoinOperator.lambda$initializeOp$0(MapJoinOperator.java:215)

       at org.apache.hadoop.hive.ql.exec.tez.ObjectCache.retrieve(ObjectCache.java:96)

       at org.apache.hadoop.hive.ql.exec.tez.ObjectCache$1.call(ObjectCache.java:113)

       at java.util.concurrent.FutureTask.run(FutureTask.java:266)