vboxDumpSharedFolders: return a value
vboxDumpSharedFolders: return a value

The allocation errors in this function are already handled by jumping
to a cleanup label.

Change the return type from void to int and return -1 on error.

Signed-off-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>

zippy2/libvirt,olafhering/libvirt,andreabolognani/libvirt,jfehlig/libvirt,crobinso/libvirt,crobinso/libvirt,libvirt/libvirt,jardasgit/libvirt,nertpinx/libvirt,libvirt/libvirt,zippy2/libvirt,fabianfreyer/libvirt,crobinso/libvirt,jardasgit/libvirt,eskultety/libvirt,olafhering/libvirt,jfehlig/libvirt,libvirt/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,eskultety/libvirt,olafhering/libvirt,andreabolognani/libvirt,crobinso/libvirt,libvirt/libvirt,zippy2/libvirt,andreabolognani/libvirt,nertpinx/libvirt,olafhering/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,jardasgit/libvirt,nertpinx/libvirt,jardasgit/libvirt,eskultety/libvirt,eskultety/libvirt,eskultety/libvirt,jfehlig/libvirt,zippy2/libvirt,jardasgit/libvirt