HIVE-8866: Vectorization on partitioned table throws ArrayIndexOutOfBoundsException when partitions are not of same #of columns (Matt McCline via Vikram Dixit K)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.14@1645825 13f79535-47bb-0310-9956-ffa450edef68