output: do not log empty arrays for sid

Ticket: #5167

src/output-json.c

@@ -132,11 +132,13 @@ void EveFileInfo(JsonBuilder *jb, const File *ff, const bool stored)
 {
     jb_set_string_from_bytes(jb, "filename", ff->name, ff->name_len);
 
+    if (ff->sid_cnt > 0) {
         jb_open_array(jb, "sid");
         for (uint32_t i = 0; ff->sid != NULL && i < ff->sid_cnt; i++) {
             jb_append_uint(jb, ff->sid[i]);
         }
         jb_close(jb);
+    }
 
 #ifdef HAVE_MAGIC
     if (ff->magic)