Stop gravatar_url falling over if nil value in db
Stop gravatar_url falling over if nil value in db

OpenAddressesUK/morph,openaustralia/morph,OpenAddressesUK/morph,otherchirps/morph,otherchirps/morph,openaustralia/morph,OpenAddressesUK/morph,OpenAddressesUK/morph,openaustralia/morph,openaustralia/morph,otherchirps/morph,otherchirps/morph,openaustralia/morph,otherchirps/morph,openaustralia/morph,otherchirps/morph,otherchirps/morph,openaustralia/morph