tracker-extract,pdf: Plug a leak
tracker-extract,pdf: Plug a leak

The poppler actions were being leaked. Another warning
about invalid reads has been fixed too

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