[tracker/wip/carlosg/coverity-fixes: 14/16] docs: Initialize variable

[Carlos Garnacho <carlosg src gnome org>]

commit 3f50c15a62b12e3309238443bfbcc4f613e33c7a
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Oct 23 15:03:14 2021 +0200

    docs: Initialize variable
    
    There's some error paths that lead to "goto error" and the enumerator
    being freed, despite it being unassigned.
    
    CID: #1506768

 docs/tools/tracker-ontology-model.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/docs/tools/tracker-ontology-model.c b/docs/tools/tracker-ontology-model.c
index c584e47ac..e2c40d8d4 100644
--- a/docs/tools/tracker-ontology-model.c
+++ b/docs/tools/tracker-ontology-model.c
@@ -303,7 +303,7 @@ tracker_ontology_model_new (GFile   *ontology_location,
 {
        TrackerOntologyModel *model;
        TrackerSparqlConnection *ontology_conn, *desc_conn;
-       GFileEnumerator *enumerator;
+       GFileEnumerator *enumerator = NULL;
        GFileInfo *info;
        GFile *dsc_ontology;