viriscsi: Request more random bits for interface name

In virStorageBackendCreateIfaceIQN() the virRandomBits() is
called in order to use random bits to generate random name for
new interface. However, virAsprintf() is expecting 32 bits and we
are requesting only 30.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Reviewed-by: NPino Toscano <ptoscano@redhat.com>

src/util/viriscsi.c

@@ -221,7 +221,7 @@ virStorageBackendCreateIfaceIQN(const char *initiatoriqn,
 
     if (virAsprintf(&temp_ifacename,
                     "libvirt-iface-%08llx",
-                    (unsigned long long)virRandomBits(30)) < 0)
+                    (unsigned long long)virRandomBits(32)) < 0)
         return -1;
 
     VIR_DEBUG("Attempting to create interface '%s' with IQN '%s'",