* src/vbox/vbox_tmpl.c (vboxStorageVolDelete): Remove always-true
array-is-non-NULL test.  git grep 'key\[.*\];'|grep -F .h
src/datatypes.h:    char key[PATH_MAX];
(vboxStorageVolGetInfo): Likewise.
(vboxStorageVolGetXMLDesc): Likewise.
(vboxStorageVolGetPath): Likewise.
(vboxDomainDefineXML): Likewise. (but now with "mac[]")