Fix for bug in latest dbf module. Pypy passes now.
Fix for bug in latest dbf module. Pypy passes now.

matterker/csvkit,metasoarous/csvkit,themiurgo/csvkit,archaeogeek/csvkit,jpalvarezf/csvkit,tlevine/csvkit,bradparks/csvkit__query_join_filter_CSV_cli,wireservice/csvkit,snuggles08/csvkit,bmispelon/csvkit,arowla/csvkit,doganmeh/csvkit,barentsen/csvkit,nriyer/csvkit,wjr1985/csvkit,cypreess/csvkit,haginara/csvkit,unpingco/csvkit,elcritch/csvkit,Jobava/csvkit,onyxfish/csvkit,moradology/csvkit,reubano/csvkit,dannguyen/csvkit,Tabea-K/csvkit,gepuro/csvkit,kyeoh/csvkit,KarrieK/csvkit,aequitas/csvkit