test: add getblockfrompeer coverage of invalid inputs
test: add getblockfrompeer coverage of invalid inputs

ajtowns/bitcoin,namecoin/namecoin-core,Xekyo/bitcoin,jambolo/bitcoin,namecoin/namecore,namecoin/namecoin-core,sipsorcery/bitcoin,fujicoin/fujicoin,jambolo/bitcoin,AkioNak/bitcoin,tecnovert/particl-core,jamesob/bitcoin,kallewoof/bitcoin,ajtowns/bitcoin,fujicoin/fujicoin,mruddy/bitcoin,particl/particl-core,sstone/bitcoin,namecoin/namecoin-core,fujicoin/fujicoin,Xekyo/bitcoin,fujicoin/fujicoin,fanquake/bitcoin,fujicoin/fujicoin,jamesob/bitcoin,particl/particl-core,sstone/bitcoin,particl/particl-core,fanquake/bitcoin,namecoin/namecore,fanquake/bitcoin,tecnovert/particl-core,namecoin/namecoin-core,particl/particl-core,fanquake/bitcoin,mruddy/bitcoin,kallewoof/bitcoin,lateminer/bitcoin,tecnovert/particl-core,jambolo/bitcoin,mruddy/bitcoin,Xekyo/bitcoin,fanquake/bitcoin,kallewoof/bitcoin,sipsorcery/bitcoin,sipsorcery/bitcoin,lateminer/bitcoin,Xekyo/bitcoin,Xekyo/bitcoin,sstone/bitcoin,lateminer/bitcoin,sipsorcery/bitcoin,bitcoin/bitcoin,bitcoinsSG/bitcoin,namecoin/namecore,kallewoof/bitcoin,ajtowns/bitcoin,jamesob/bitcoin,bitcoinsSG/bitcoin,particl/particl-core,fujicoin/fujicoin,sstone/bitcoin,lateminer/bitcoin,sipsorcery/bitcoin,AkioNak/bitcoin,AkioNak/bitcoin,kallewoof/bitcoin,bitcoinsSG/bitcoin,bitcoin/bitcoin,particl/particl-core,Xekyo/bitcoin,tecnovert/particl-core,ajtowns/bitcoin,AkioNak/bitcoin,jambolo/bitcoin,bitcoinsSG/bitcoin,tecnovert/particl-core,namecoin/namecoin-core,bitcoinsSG/bitcoin,jamesob/bitcoin,ajtowns/bitcoin,bitcoin/bitcoin,lateminer/bitcoin,namecoin/namecore,jamesob/bitcoin,tecnovert/particl-core,sstone/bitcoin,sstone/bitcoin,jambolo/bitcoin,namecoin/namecore,bitcoinsSG/bitcoin,bitcoin/bitcoin,lateminer/bitcoin,namecoin/namecoin-core,AkioNak/bitcoin,bitcoin/bitcoin,mruddy/bitcoin,ajtowns/bitcoin,jambolo/bitcoin,sipsorcery/bitcoin,mruddy/bitcoin,jamesob/bitcoin,kallewoof/bitcoin,fanquake/bitcoin,AkioNak/bitcoin,mruddy/bitcoin,bitcoin/bitcoin,namecoin/namecore