util: Check for file being NULL in DirectoryCommit
util: Check for file being NULL in DirectoryCommit

ElementsProject/elements,AkioNak/bitcoin,pstratem/bitcoin,namecoin/namecore,n1bor/bitcoin,achow101/bitcoin,kallewoof/bitcoin,dscotese/bitcoin,practicalswift/bitcoin,jlopp/statoshi,bitcoin/bitcoin,fanquake/bitcoin,n1bor/bitcoin,jambolo/bitcoin,fanquake/bitcoin,ajtowns/bitcoin,sipsorcery/bitcoin,practicalswift/bitcoin,jnewbery/bitcoin,apoelstra/bitcoin,andreaskern/bitcoin,Xekyo/bitcoin,instagibbs/bitcoin,bitcoinknots/bitcoin,rnicoll/bitcoin,domob1812/bitcoin,andreaskern/bitcoin,bitcoinknots/bitcoin,kallewoof/bitcoin,rnicoll/bitcoin,domob1812/namecore,n1bor/bitcoin,bitcoinknots/bitcoin,GroestlCoin/GroestlCoin,anditto/bitcoin,mruddy/bitcoin,MeshCollider/bitcoin,mm-s/bitcoin,mm-s/bitcoin,domob1812/bitcoin,apoelstra/bitcoin,kallewoof/bitcoin,jnewbery/bitcoin,prusnak/bitcoin,GroestlCoin/GroestlCoin,mm-s/bitcoin,particl/particl-core,lateminer/bitcoin,Sjors/bitcoin,sstone/bitcoin,mruddy/bitcoin,JeremyRubin/bitcoin,apoelstra/bitcoin,anditto/bitcoin,yenliangl/bitcoin,pataquets/namecoin-core,bitcoin/bitcoin,mruddy/bitcoin,fujicoin/fujicoin,rnicoll/bitcoin,tecnovert/particl-core,instagibbs/bitcoin,kallewoof/bitcoin,ajtowns/bitcoin,pstratem/bitcoin,prusnak/bitcoin,cdecker/bitcoin,namecoin/namecore,particl/particl-core,rnicoll/bitcoin,jambolo/bitcoin,particl/particl-core,MeshCollider/bitcoin,prusnak/bitcoin,jlopp/statoshi,yenliangl/bitcoin,bitcoinsSG/bitcoin,instagibbs/bitcoin,achow101/bitcoin,namecoin/namecore,n1bor/bitcoin,achow101/bitcoin,prusnak/bitcoin,namecoin/namecore,instagibbs/bitcoin,Xekyo/bitcoin,namecoin/namecore,instagibbs/bitcoin,rnicoll/bitcoin,rnicoll/bitcoin,lateminer/bitcoin,jamesob/bitcoin,MarcoFalke/bitcoin,mruddy/bitcoin,qtumproject/qtum,MarcoFalke/bitcoin,bitcoinsSG/bitcoin,GroestlCoin/GroestlCoin,sipsorcery/bitcoin,yenliangl/bitcoin,apoelstra/bitcoin,EthanHeilman/bitcoin,bitcoinknots/bitcoin,Sjors/bitcoin,apoelstra/bitcoin,prusnak/bitcoin,anditto/bitcoin,pataquets/namecoin-core,prusnak/bitcoin,lateminer/bitcoin,sstone/bitcoin,JeremyRubin/bitcoin,qtumproject/qtum,EthanHeilman/bitcoin,achow101/bitcoin,achow101/bitcoin,Xekyo/bitcoin,andreaskern/bitcoin,Sjors/bitcoin,dscotese/bitcoin,domob1812/namecore,jamesob/bitcoin,pstratem/bitcoin,AkioNak/bitcoin,ElementsProject/elements,ajtowns/bitcoin,mruddy/bitcoin,dscotese/bitcoin,domob1812/bitcoin,JeremyRubin/bitcoin,Xekyo/bitcoin,tecnovert/particl-core,Xekyo/bitcoin,jnewbery/bitcoin,n1bor/bitcoin,sipsorcery/bitcoin,qtumproject/qtum,MarcoFalke/bitcoin,GroestlCoin/GroestlCoin,qtumproject/qtum,EthanHeilman/bitcoin,sstone/bitcoin,particl/particl-core,GroestlCoin/bitcoin,ElementsProject/elements,anditto/bitcoin,JeremyRubin/bitcoin,domob1812/namecore,jambolo/bitcoin,fanquake/bitcoin,JeremyRubin/bitcoin,AkioNak/bitcoin,sipsorcery/bitcoin,sipsorcery/bitcoin,tecnovert/particl-core,namecoin/namecore,tecnovert/particl-core,achow101/bitcoin,fanquake/bitcoin,cdecker/bitcoin,sstone/bitcoin,particl/particl-core,EthanHeilman/bitcoin,instagibbs/bitcoin,Xekyo/bitcoin,fujicoin/fujicoin,MarcoFalke/bitcoin,MeshCollider/bitcoin,cdecker/bitcoin,MeshCollider/bitcoin,domob1812/bitcoin,dscotese/bitcoin,bitcoinsSG/bitcoin,GroestlCoin/bitcoin,jlopp/statoshi,jnewbery/bitcoin,ajtowns/bitcoin,fujicoin/fujicoin,MeshCollider/bitcoin,namecoin/namecoin-core,domob1812/namecore,pataquets/namecoin-core,practicalswift/bitcoin,pataquets/namecoin-core,AkioNak/bitcoin,andreaskern/bitcoin,practicalswift/bitcoin,jambolo/bitcoin,mm-s/bitcoin,bitcoinsSG/bitcoin,namecoin/namecoin-core,bitcoin/bitcoin,pataquets/namecoin-core,bitcoin/bitcoin,Sjors/bitcoin,domob1812/bitcoin,jamesob/bitcoin,domob1812/namecore,yenliangl/bitcoin,anditto/bitcoin,bitcoinknots/bitcoin,lateminer/bitcoin,mm-s/bitcoin,practicalswift/bitcoin,jlopp/statoshi,namecoin/namecoin-core,qtumproject/qtum,sipsorcery/bitcoin,domob1812/namecore,practicalswift/bitcoin,Sjors/bitcoin,mruddy/bitcoin,sstone/bitcoin,fanquake/bitcoin,GroestlCoin/bitcoin,EthanHeilman/bitcoin,cdecker/bitcoin,fanquake/bitcoin,sstone/bitcoin,kallewoof/bitcoin,bitcoin/bitcoin,GroestlCoin/bitcoin,domob1812/bitcoin,jamesob/bitcoin,pataquets/namecoin-core,fujicoin/fujicoin,andreaskern/bitcoin,bitcoinsSG/bitcoin,cdecker/bitcoin,particl/particl-core,jamesob/bitcoin,ajtowns/bitcoin,yenliangl/bitcoin,lateminer/bitcoin,MeshCollider/bitcoin,ElementsProject/elements,jnewbery/bitcoin,fujicoin/fujicoin,andreaskern/bitcoin,lateminer/bitcoin,AkioNak/bitcoin,pstratem/bitcoin,jambolo/bitcoin,GroestlCoin/bitcoin,fujicoin/fujicoin,GroestlCoin/bitcoin,kallewoof/bitcoin,apoelstra/bitcoin,anditto/bitcoin,EthanHeilman/bitcoin,tecnovert/particl-core,yenliangl/bitcoin,dscotese/bitcoin,qtumproject/qtum,namecoin/namecoin-core,jambolo/bitcoin,AkioNak/bitcoin,mm-s/bitcoin,MarcoFalke/bitcoin,GroestlCoin/GroestlCoin,pstratem/bitcoin,jlopp/statoshi,cdecker/bitcoin,namecoin/namecoin-core,dscotese/bitcoin,pstratem/bitcoin,JeremyRubin/bitcoin,jamesob/bitcoin,n1bor/bitcoin,ElementsProject/elements,qtumproject/qtum,ElementsProject/elements,bitcoinsSG/bitcoin,GroestlCoin/GroestlCoin,MarcoFalke/bitcoin,bitcoin/bi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