add bip32: to error messages
add bip32: to error messages

...to be consistent with the rest of the library

martindale/bitcore,eordano/bitcore,TOMOAKI12345/bitcore,TeamPiggyCoin/PiggyCore,bitpay/bitcore,bankonme/bitcore,bankonme/bitcore,jcvernaleo/bitcore,iobond/bitcore,reddit/fullnode,janko33bd/bitcore,bitjson/bitcore,bitjson/bitcore,olalonde/bitcore,jcvernaleo/bitcore,eXcomm/bitcore,GroestlCoin/groestlcore,martindale/bitcore,ryanxcharles/fullnode,martindale/bitcore,iobond/bitcore,daxxog/clamcore,phplaboratory/bitcore,eordano/bitcore,williamcotton/bitcore,olalonde/bitcore,genecyber/bitcore,TeamPiggyCoin/PiggyCore,bitjson/bitcore,UdjinM6/bitcore-dash,bilthon/bitcore,braydonf/bitcore,adjoinant/bitcore,lekkas/bitcore,martindale/fullnode,martindale/bitcore,bitpay/bitcore,adjoinant/bitcore,bitpay/bitcore,bitpay/bitcore,phplaboratory/bitcore,MonetaryUnit/bitcore,eXcomm/bitcore,williamcotton/bitcore,initaldk/bitcore,initaldk/bitcore,janko33bd/bitcore,bitjson/bitcore,MonetaryUnit/bitcore,pnagurny/bitcore,iobond/bitcore,lekkas/bitcore,bilthon/bitcore,genecyber/bitcore,iobond/bitcore,daxxog/clamcore,litecoin-project/litecore,litecoin-project/litecore,iobond/bitcore,ryanxcharles/fullnode,braydonf/bitcore,martindale/fullnode,maraoz/coinforge,maraoz/coinforge,pnagurny/bitcore,TOMOAKI12345/bitcore