qemu: qemuDomainNamespaceUnlinkPaths: Return 0 in case of success
Commit 7a931a4204af refactored the code and probably forgot to add
this line.
Signed-off-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>