Fix #30
Fix #30

Handle case, if not even a empty vcard is provided.
pravi/jsxc,pravi/jsxc,svbergerem/jsxc,diaspora/jsxc,jsxc/jsxc,Zauberstuhl/jsxc,jsxc/jsxc,pravi/jsxc,jsxc/jsxc,svbergerem/jsxc,Zauberstuhl/jsxc,Zauberstuhl/jsxc,svbergerem/jsxc,diaspora/jsxc,diaspora/jsxc