Panel pager plugin fails on default config

[Pasi Orovuo]

Hey,

A user on #Xfce reported that the panel fails with a fresh config (no
~/.config at all).

Error reported:
kris at localhost ~ %
libxfcegui4-ERROR **: file netk-pager.c: line 274
(netk_pager_size_request): assertion failed: (pager->priv->n_rows > 0)
aborting...

On a quick look it seems that the panel plugin allocates new memory for
interal struct with g_new0() and then sets pager's row count using the
value in the allocated struct. While it's somewhat a bug in the plugin,
a proper fix would go in libxfcegui4 I guess. See:
http://medusa.tutka.fi/~pasi/pager_n_rows.patch

-Pasi