bliptv: Check for no search results
bliptv: Check for no search results

When performing a search, and no results are found, instead of getting an empty
result dataset, Blip.tv returns just one "virtual" element telling there are
not results.

This commit checks for this case, and returns no results in case of matching
it.

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