If backend cannot enumerate entries, return 0 entries with NULL array

diff --git a/src/backend.c b/src/backend.c
index e44008f..31c8ecd 100644 (file)
--- a/src/backend.c
+++ b/src/backend.c
@@ -81,6 +81,10 @@ atom_backend_enumerate_entries (AtomCtx *ctx, AtomEntry *** entries, size_t *len
       backend->enumerate_entries (ctx, entries, len);
       return;
     }
+  if (entries)
+    *entries = NULL;
+  if (len)
+    *len = 0;
 }
 
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