libtracker-fts: Do not use static variable for prepared statements
libtracker-fts: Do not use static variable for prepared statements

Database cannot be closed with non-finalized statements.

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