cache file: Don't crash if file has no fields.

--HG--
branch : HEAD

diff --git a/src/lib-index/mail-cache-fields.c b/src/lib-index/mail-cache-fields.c
index e44ae6c51aa91ef4ab9dcd4f58279ab0aea24e92..7dd264b1c557f5e43dfc0da09a68ed90fe8444b1 100644 (file)
--- a/src/lib-index/mail-cache-fields.c
+++ b/src/lib-index/mail-cache-fields.c
@@ -155,7 +155,8 @@ mail_cache_register_get_list(struct mail_cache *cache, pool_t pool,
        if (!cache->opened)
                (void)mail_cache_open_and_verify(cache);
 
-       list = p_new(pool, struct mail_cache_field, cache->fields_count);
+       list = cache->fields_count == 0 ? NULL :
+               p_new(pool, struct mail_cache_field, cache->fields_count);
        for (i = 0; i < cache->fields_count; i++) {
                list[i] = cache->fields[i].field;
                list[i].name = p_strdup(pool, list[i].name);