[jamendo] Implement our own xmlChildCount() function if libxml2 is less than 2.7.0.
[jamendo] Implement our own xmlChildCount() function if libxml2 is less than
2.7.0.

vrutkovs/grilo-plugins,MikePetullo/grilo-plugins,MathieuDuponchelle/grilo-plugins,vrutkovs/grilo-plugins,grilofw/grilo-plugins,GNOME/grilo-plugins,jasuarez/grilo-plugins,kyoushuu/grilo-plugins,MathieuDuponchelle/grilo-plugins,kyoushuu/grilo-plugins,vrutkovs/grilo-plugins,MikePetullo/grilo-plugins,MikePetullo/grilo-plugins,MathieuDuponchelle/grilo-plugins,jasuarez/grilo-plugins,kyoushuu/grilo-plugins,grilofw/grilo-plugins,MathieuDuponchelle/grilo-plugins,vrutkovs/grilo-plugins,GNOME/grilo-plugins