Convert MsgGetData errors to MessageError type.
Convert MsgGetData errors to MessageError type.

CryptocurrencyCabal/htcd,qchain/btcd,ltcsuite/ltcd,jimmysong/btcd,dajohi/btcd,jimmysong/btcd,jrick/btcd,decred/dcrd,Dirbaio/btcd,stevenroose/btcd,jcmincke/dcrd,glv2/ppcd,Stash-Crypto/btcd,DanielKrawisz/btcd,pkothbauer/btcd,jrick/btcd,jcmincke/dcrd,stevenroose/btcd,danoctavian/btcd,glv2/ppcd,soapboxsys/ombfullnode,DanielKrawisz/btcd,btcsuitereleases/btcd,decred/dcrd,aakselrod/btcd,runeaune/btcd,Dirbaio/btcd,aakselrod/btcd,jrick/dcrd,hectorj/btcd,qchain/btcd,Roasbeef/btcd,pkothbauer/btcd,Dirbaio/btcd,btcsuite/btcd,adiabat/btcd,Cleawing/btcd,ppcsuite/ppcd,BitGo/prova,Roasbeef/btcd,mathiasrw/btcd,jrick/btcd,FactomProject/btcd,Stash-Crypto/btcd,wallclockbuilder/btcd,danoctavian/btcd,mathiasrw/btcd,ppcsuite/ppcd,1d4Nf6/btcd,toddfries/btcd,dajohi/btcd,davecgh/btcd,jongillham/btcd,adiabat/btcd,ltcsuite/ltcd,ppcsuite/ppcd-old,BitGo/prova,cqswxj2013/btcd,tb00/btcd,dan-da/btcd,hectorj/btcd,cjepson/btcd,CryptocurrencyCabal/htcd,cjepson/btcd,ppcsuite/ppcd-old,dajohi/btcd,tb00/btcd,1d4Nf6/btcd,jrick/dcrd,wallclockbuilder/btcd,btcsuitereleases/btcd,cqswxj2013/btcd,Cleawing/btcd,soapboxsys/ombfullnode,FactomProject/btcd,toddfries/btcd,dan-da/btcd,davecgh/btcd,jongillham/btcd,runeaune/btcd,jcmincke/dcrd,btcsuite/btcd