HIVE-12826: Vectorization: fix VectorUDAF* suspect isNull checks (errata.txt)
HIVE-12826: Vectorization: fix VectorUDAF* suspect isNull checks (errata.txt)

vineetgarg02/hive,lirui-apache/hive,lirui-apache/hive,sankarh/hive,anishek/hive,b-slim/hive,sankarh/hive,jcamachor/hive,vineetgarg02/hive,lirui-apache/hive,alanfgates/hive,jcamachor/hive,b-slim/hive,lirui-apache/hive,nishantmonu51/hive,vergilchiu/hive,vergilchiu/hive,lirui-apache/hive,sankarh/hive,anishek/hive,lirui-apache/hive,anishek/hive,vineetgarg02/hive,alanfgates/hive,nishantmonu51/hive,nishantmonu51/hive,b-slim/hive,alanfgates/hive,sankarh/hive,jcamachor/hive,anishek/hive,lirui-apache/hive,sankarh/hive,alanfgates/hive,jcamachor/hive,alanfgates/hive,sankarh/hive,alanfgates/hive,vineetgarg02/hive,nishantmonu51/hive,vineetgarg02/hive,vergilchiu/hive,jcamachor/hive,b-slim/hive,vergilchiu/hive,sankarh/hive,nishantmonu51/hive,anishek/hive,jcamachor/hive,jcamachor/hive,anishek/hive,vineetgarg02/hive,b-slim/hive,sankarh/hive,b-slim/hive,nishantmonu51/hive,vineetgarg02/hive,nishantmonu51/hive,anishek/hive,lirui-apache/hive,anishek/hive,vineetgarg02/hive,b-slim/hive,vergilchiu/hive,anishek/hive,vineetgarg02/hive,alanfgates/hive,vergilchiu/hive,lirui-apache/hive,b-slim/hive,jcamachor/hive,jcamachor/hive,alanfgates/hive,b-slim/hive,nishantmonu51/hive,vergilchiu/hive,nishantmonu51/hive,vergilchiu/hive,sankarh/hive,alanfgates/hive,vergilchiu/hive