dthelp: fix memory leak in m_openent() in canon1
dthelp: fix dumpxref() writing to an already-closed FILE* in canon1
dtappbuilder: fix double closedir() in destroy_links_to_file()
dtappbuilder: remove dead verify_for_write/verify_for_read/member_error prototypes
dtappbuilder: remove dead variables in obj_fields.c
dtappbuilder: silence -Wswitch noise in obj_fields.c AB_ARG_TYPE switch
dtappbuilder: silence -Wswitch noise in obj_fields.c AB_DIRECTION switches
dtappbuilder: silence -Wswitch noise in obj_fields.c ABObj type dispatch