BUG: dump: handle empty answer
BUG: dump: handle empty answer

fixes #396

Signed-off-by: Sebastian Wagner <1b00c120e1c33c7e19a7cb69011b74f705830cf8@sebix.at>

aaronkaplan/intelmq,pkug/intelmq,certtools/intelmq,certtools/intelmq,pkug/intelmq,aaronkaplan/intelmq,certtools/intelmq,aaronkaplan/intelmq,robcza/intelmq,pkug/intelmq,robcza/intelmq,robcza/intelmq,robcza/intelmq,pkug/intelmq