dvtm.c: parse_args(): needs 2nd NULL
dvtm.c: parse_args(): needs 2nd NULL

create() tests args[2], which was causing a segfault

gridsystem/dvtmx,lotrfan/dvtm,tgvaughan/dvtm,tgvaughan/dvtm,delphinus35/dvtm,armanbilge/dvtm,lotrfan/dvtm,delphinus35/dvtm,lotrfan/dvtm,tgvaughan/dvtm,armanbilge/dvtm,gridsystem/dvtmx