libtracker-data: Fix printf string format
libtracker-data: Fix printf string format

Introduced by commit 81135ae19c727df716d0c0945869462e75a53497.

https://bugzilla.gnome.org/show_bug.cgi?id=752717

outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker