Fix valgrind check by initialising DeletionState.
Fix valgrind check by initialising DeletionState.

Summary:
The valgrind error was introduced by commit
1510339e5257073af82f8c07e6fa1f2a9144e6aa. Initialize DeletionState
in constructor.

Test Plan: valgrind --leak-check=yes ./deletefile_test

Reviewers: igor, kailiu

Reviewed By: kailiu

CC: leveldb

Differential Revision: https://reviews.facebook.net/D13983

anagav/rocksdb,jalexanderqed/rocksdb,hobinyoon/rocksdb,msb-at-yahoo/rocksdb,ryneli/rocksdb,mbarbon/rocksdb,Andymic/rocksdb,norton/rocksdb,wenduo/rocksdb,wskplho/rocksdb,JohnPJenkins/rocksdb,SunguckLee/RocksDB,zhangpng/rocksdb,jalexanderqed/rocksdb,facebook/rocksdb,makelivedotnet/rocksdb,skunkwerks/rocksdb,kaschaeffer/rocksdb,vashstorm/rocksdb,sorphi/rocksdb,NickCis/rocksdb,geraldoandradee/rocksdb,hobinyoon/rocksdb,JohnPJenkins/rocksdb,norton/rocksdb,NickCis/rocksdb,Andymic/rocksdb,luckywhu/rocksdb,fengshao0907/rocksdb,mbarbon/rocksdb,siddhartharay007/rocksdb,RyanTech/rocksdb,fengshao0907/rocksdb,lgscofield/rocksdb,skunkwerks/rocksdb,lgscofield/rocksdb,wenduo/rocksdb,anagav/rocksdb,lgscofield/rocksdb,temicai/rocksdb,JoeWoo/rocksdb,facebook/rocksdb,SunguckLee/RocksDB,sorphi/rocksdb,mbarbon/rocksdb,vmx/rocksdb,RyanTech/rocksdb,tizzybec/rocksdb,Andymic/rocksdb,msb-at-yahoo/rocksdb,wskplho/rocksdb,Applied-Duality/rocksdb,siddhartharay007/rocksdb,bbiao/rocksdb,makelivedotnet/rocksdb,Vaisman/rocksdb,vmx/rocksdb,JoeWoo/rocksdb,rDSN-Projects/rocksdb.replicated,alihalabyah/rocksdb,flabby/rocksdb,vmx/rocksdb,zhangpng/rocksdb,tsheasha/rocksdb,biddyweb/rocksdb,wlqGit/rocksdb,bbiao/rocksdb,caijieming-baidu/rocksdb,zhangpng/rocksdb,skunkwerks/rocksdb,siddhartharay007/rocksdb,bbiao/rocksdb,fengshao0907/rocksdb,tizzybec/rocksdb,kaschaeffer/rocksdb,JohnPJenkins/rocksdb,wlqGit/rocksdb,rDSN-Projects/rocksdb.replicated,sorphi/rocksdb,wenduo/rocksdb,Andymic/rocksdb,facebook/rocksdb,OverlordQ/rocksdb,JoeWoo/rocksdb,SunguckLee/RocksDB,virtdb/rocksdb,tizzybec/rocksdb,alihalabyah/rocksdb,caijieming-baidu/rocksdb,rDSN-Projects/rocksdb.replicated,RyanTech/rocksdb,OverlordQ/rocksdb,norton/rocksdb,wenduo/rocksdb,luckywhu/rocksdb,facebook/rocksdb,jalexanderqed/rocksdb,amyvmiwei/rocksdb,Andymic/rocksdb,norton/rocksdb,wat-ze-hex/rocksdb,vmx/rocksdb,IMCG/RcoksDB,OverlordQ/rocksdb,tsheasha/rocksdb,tsheasha/rocksdb,dkorolev/rocksdb,jalexanderqed/rocksdb,sorphi/rocksdb,msb-at-yahoo/rocksdb,tizzybec/rocksdb,zhangpng/rocksdb,caijieming-baidu/rocksdb,Andymic/rocksdb,wlqGit/rocksdb,NickCis/rocksdb,JoeWoo/rocksdb,wlqGit/rocksdb,sorphi/rocksdb,flabby/rocksdb,bbiao/rocksdb,SunguckLee/RocksDB,geraldoandradee/rocksdb,wenduo/rocksdb,IMCG/RcoksDB,luckywhu/rocksdb,wat-ze-hex/rocksdb,wskplho/rocksdb,bbiao/rocksdb,kaschaeffer/rocksdb,flabby/rocksdb,tschottdorf/rocksdb,NickCis/rocksdb,JoeWoo/rocksdb,vmx/rocksdb,tsheasha/rocksdb,OverlordQ/rocksdb,hobinyoon/rocksdb,lgscofield/rocksdb,Applied-Duality/rocksdb,wat-ze-hex/rocksdb,JackLian/rocksdb,rDSN-Projects/rocksdb.replicated,Applied-Duality/rocksdb,wskplho/rocksdb,caijieming-baidu/rocksdb,JohnPJenkins/rocksdb,geraldoandradee/rocksdb,tschottdorf/rocksdb,IMCG/RcoksDB,ryneli/rocksdb,dkorolev/rocksdb,IMCG/RcoksDB,geraldoandradee/rocksdb,facebook/rocksdb,geraldoandradee/rocksdb,rDSN-Projects/rocksdb.replicated,msb-at-yahoo/rocksdb,kaschaeffer/rocksdb,wlqGit/rocksdb,ylong/rocksdb,skunkwerks/rocksdb,skunkwerks/rocksdb,norton/rocksdb,ylong/rocksdb,IMCG/RcoksDB,JackLian/rocksdb,biddyweb/rocksdb,ryneli/rocksdb,Vaisman/rocksdb,tizzybec/rocksdb,wat-ze-hex/rocksdb,Vaisman/rocksdb,caijieming-baidu/rocksdb,wat-ze-hex/rocksdb,mbarbon/rocksdb,wenduo/rocksdb,hobinyoon/rocksdb,wat-ze-hex/rocksdb,lgscofield/rocksdb,virtdb/rocksdb,NickCis/rocksdb,JackLian/rocksdb,makelivedotnet/rocksdb,bbiao/rocksdb,biddyweb/rocksdb,kaschaeffer/rocksdb,jalexanderqed/rocksdb,JoeWoo/rocksdb,vashstorm/rocksdb,JoeWoo/rocksdb,vmx/rocksdb,temicai/rocksdb,amyvmiwei/rocksdb,wlqGit/rocksdb,Vaisman/rocksdb,msb-at-yahoo/rocksdb,temicai/rocksdb,amyvmiwei/rocksdb,wlqGit/rocksdb,ryneli/rocksdb,siddhartharay007/rocksdb,biddyweb/rocksdb,skunkwerks/rocksdb,virtdb/rocksdb,tsheasha/rocksdb,biddyweb/rocksdb,amyvmiwei/rocksdb,mbarbon/rocksdb,Applied-Duality/rocksdb,rDSN-Projects/rocksdb.replicated,norton/rocksdb,fengshao0907/rocksdb,facebook/rocksdb,ryneli/rocksdb,bbiao/rocksdb,tsheasha/rocksdb,JohnPJenkins/rocksdb,NickCis/rocksdb,bbiao/rocksdb,Andymic/rocksdb,flabby/rocksdb,jalexanderqed/rocksdb,sorphi/rocksdb,JohnPJenkins/rocksdb,RyanTech/rocksdb,OverlordQ/rocksdb,siddhartharay007/rocksdb,skunkwerks/rocksdb,caijieming-baidu/rocksdb,biddyweb/rocksdb,ryneli/rocksdb,SunguckLee/RocksDB,temicai/rocksdb,SunguckLee/RocksDB,wenduo/rocksdb,makelivedotnet/rocksdb,siddhartharay007/rocksdb,hobinyoon/rocksdb,jalexanderqed/rocksdb,ylong/rocksdb,luckywhu/rocksdb,anagav/rocksdb,anagav/rocksdb,rDSN-Projects/rocksdb.replicated,mbarbon/rocksdb,fengshao0907/rocksdb,vmx/rocksdb,mbarbon/rocksdb,vashstorm/rocksdb,JackLian/rocksdb,NickCis/rocksdb,RyanTech/rocksdb,norton/rocksdb,IMCG/RcoksDB,zhangpng/rocksdb,geraldoandradee/rocksdb,SunguckLee/RocksDB,dkorolev/rocksdb,JackLian/rocksdb,tschottdorf/rocksdb,makelivedotnet/rocksdb,Applied-Duality/rocksdb,virtdb/rocksdb,OverlordQ/rocksdb,RyanTech/rocksdb,wskplho/rocksdb,lgscofield/rocksdb,tizzybec/rocksdb,zhangpng/rocksdb,ylong/rocksdb,wskplho/rocksdb,luckywhu/rocksdb,tschottdorf/rocksdb,alihalabyah/rocksdb,vashstorm/rocksdb,Andymic/rocksdb,hobinyoon/rocksdb,alihalabyah/rocksdb,fengshao0907/rocksdb,flabby/rocksdb,siddhartharay007/rocksdb,ryneli/rocksdb,hobinyoon/rocksdb,kaschaeffer/rocksdb,wat-ze-hex/rocksdb,amyvmiwei/rocksdb,Applied-Duality/rocksdb,ylong/rocksdb,kaschaeffer/rocksdb,virtdb/rocksdb,vashstorm/rocksdb,alihalabyah/rocksdb,makelivedotnet/rocksdb,SunguckLee/RocksDB,virtdb/rocksdb,ylong/rocksdb,OverlordQ/rocksdb,temicai/rocksdb,makelivedotnet/rocksdb,flabby/rocksdb,dkorolev/rocksdb,anagav/rocksdb,hobinyoon/rocksdb,Vaisman/rocksdb,flabby/rocksdb,tsheasha/rocksdb,tschottdorf/rocksdb,amyvmiwei/rocksdb,temicai/rocksdb,alihalabyah/rocksdb,wskplho/rocksdb,luckywhu/rocksdb,Vaisman/rocksdb,tschottdorf/rocksdb,anagav/rocksdb,caijieming-baidu/rocksdb,JackLian/rocksdb,Vaisman/rocksdb,amyvmiwei/rocksdb,JackLian/rocksdb,wenduo/rocksdb,zhangpng/rocksdb,lgscofield/rocksdb,facebook/rocksdb,luckywhu/rocksdb,fengshao0907/rocksdb,tizzybec/rocksdb,ylong/rocksdb,virtdb/rocksdb,vmx/rocksdb,biddyweb/rocksdb,vashstorm/rocksdb,tsheasha/rocksdb,geraldoandradee/rocksdb,JohnPJenkins/rocksdb,wat-ze-hex/rocksdb,norton/rocksdb,dkorolev/rocksdb,temicai/rocksdb,facebook/rocksdb,RyanTech/rocksdb,IMCG/RcoksDB,alihalabyah/rocksdb,dkorolev/rocksdb,msb-at-yahoo/rocksdb,anagav/rocksdb,sorphi/rocksdb,vashstorm/rocksdb,Applied-Duality/rocksdb,dkorolev/rocksdb