Fix sorting of numeric zero values
Fix sorting of numeric zero values

ssuperczynski/ng2-easy-table,ssuperczynski/ngx-easy-table,ssuperczynski/ng2-easy-table,ssuperczynski/ngx-easy-table,ssuperczynski/ngx-easy-table,ssuperczynski/ngx-easy-table,ssuperczynski/ng2-easy-table