[libdazzle] fuzzy: be a bit more defensive

[Christian Hergert <chergert src gnome org>]

commit 5093dad1b1f8c154637c0fae4f1659dfb4c1fe87
Author: Christian Hergert <chergert redhat com>
Date:   Sat Jun 16 03:39:21 2018 -0700

    fuzzy: be a bit more defensive

 src/search/dzl-fuzzy-index-cursor.c | 2 +-
 src/search/dzl-fuzzy-index.c        | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/src/search/dzl-fuzzy-index-cursor.c b/src/search/dzl-fuzzy-index-cursor.c
index 9063808..cdbc926 100644
--- a/src/search/dzl-fuzzy-index-cursor.c
+++ b/src/search/dzl-fuzzy-index-cursor.c
@@ -459,7 +459,7 @@ dzl_fuzzy_index_cursor_worker (GTask        *task,
       guint score = dzl_int_pair_first (pair);
       guint last_offset = dzl_int_pair_second (pair);
       gpointer other_score;
-      DzlFuzzyMatch match;
+      DzlFuzzyMatch match = {0};
       guint lookaside_id = GPOINTER_TO_UINT (key);
 
       if G_UNLIKELY (!_dzl_fuzzy_index_resolve (self->index,
diff --git a/src/search/dzl-fuzzy-index.c b/src/search/dzl-fuzzy-index.c
index 1b035f9..9ee8139 100644
--- a/src/search/dzl-fuzzy-index.c
+++ b/src/search/dzl-fuzzy-index.c
@@ -479,6 +479,9 @@ _dzl_fuzzy_index_resolve (DzlFuzzyIndex  *self,
   g_assert (out_score != NULL);
   g_assert (priority != NULL);
 
+  if (self->keys == NULL || self->lookaside_raw == NULL)
+    return FALSE;
+
   /* Mask off the key priority */
   lookaside_id &= 0x00FFFFFF;