[tracker] (16 commits) Created branch wip/carlosg/coverity-fixes

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/coverity-fixes' was created.

Summary of new commits:

  a8b01f9... tracker: Check return value of g_file_get_contents
  dd885f9... libtracker-sparql: Check return values of XML writer functi
  4c85537... tracker: Check return value of g_setenv
  b3f284f... tracker: Test return value of g_file_get_contents()
  e44bae2... libtracker-data: Check return value of g_unlink
  1309e11... libtracker-data: Check return value of g_mkdir_with_parents
  c81805e... libtracker-data: Warn in place during rollback on first tim
  c72717a... libtracker-data: Check the return value of write_ontologies
  04decee... libtracker-data: Do not check for out variable being NULL
  854e033... tracker: Check the return value of g_filename_to_utf8()
  7e3159c... libtracker-data: Free query variable earlier
  c372fbc... libtracker-data: Handle TrackerBinding together in code
  d030fd7... docs: Avoid GError double free
  3f50c15... docs: Initialize variable
  ae37000... docs: Initialize variable
  941fd6f... libtracker-data: Avoid propagating errors based on uninitia