network: Don't check the output of virGetUserConfigDirectory()

virGetUserConfigDirectory() *never* *ever* returns NULL, making the
checks for it completely unnecessary.
Signed-off-by: NFabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/network/bridge_driver.c

@@ -741,7 +741,7 @@ networkStateInitialize(bool privileged,
     } else {
         configdir = virGetUserConfigDirectory();
         rundir = virGetUserRuntimeDirectory();
-        if (!(configdir && rundir))
+        if (!rundir)
             goto error;
 
         network_driver->networkConfigDir = g_strdup_printf("%s/qemu/networks", configdir);