libvirt_domain_get_network_info: Don't overwrite retval
libvirt_domain_get_network_info: Don't overwrite retval

In e0d6f457 I've tried to fix a memleak. However, in
libvirt_domain_get_network_info instead of plain 'return' I've
put 'RETURN_TRUE'. This macro throws away whatever return value
we've constructed so far and replace it with integer value of 1.
Le sigh.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

libvirt/libvirt-php,libvirt/libvirt-php,zippy2/libvirt-php,zippy2/libvirt-php,libvirt/libvirt-php,zippy2/libvirt-php