[Tracker] compiler warnings

[<tpgww onepost net>]

I just built tracker svn (734, from yesterday) and, among the many compiler-warnings generated, I see a few 
that really should be investigated and dealt with one way or another:

trackerd.c:2349: warning: ignoring return value of 'nice', declared with attribute warn_unused_result
trackerd.c:1021: warning: 'list' may be used uninitialized in this function
tracker-db-sqlite.c:462: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result
tracker-db-sqlite.c:1189: warning: ignoring return value of 'link', declared with attribute warn_unused_result
tracker-db-email.c:412: warning: 'mbox_id' may be used uninitialized in this function
tracker-dbus-search.c:901: warning: 'winner_dist' may be used uninitialized in this function
tracker-utils.c:3441: warning: ignoring return value of 'nice', declared with attribute warn_unused_result
tracker-extract.c:212: warning: ignoring return value of 'nice', declared with attribute warn_unused_result
tracker-extract-ps.c:101: warning: ignoring return value of 'getline', declared with attribute 
warn_unused_result
tracker-extract-ps.c:139: warning: ignoring return value of 'getline', declared with attribute 
warn_unused_result
tracker-extract-abw.c:35: warning: ignoring return value of 'getline', declared with attribute 
warn_unused_result
tracker-extract-abw.c:62: warning: ignoring return value of 'getline', declared with attribute 
warn_unused_result
tracker-extract-gstreamer.c:233: warning: 'message' is used uninitialized in this function

Regards
Tom