Fixed output extensions not working when there are no input files (regression test failing)
Fixed output extensions not working when there are no input files (regression test failing)

sb43/bpipe,sb43/bpipe,tucano/bpipe,tucano/bpipe,vivovip/bpipe,sb43/bpipe,vivovip/bpipe,vivovip/bpipe,tucano/bpipe