subparse: follow-up build fix after d871b1205
diff --git a/gst/subparse/gstsubparse.c b/gst/subparse/gstsubparse.c
index a83ac75..58d7606 100644
--- a/gst/subparse/gstsubparse.c
+++ b/gst/subparse/gstsubparse.c
@@ -837,8 +837,8 @@
 
     s = g_string_new (*p_txt);
     while (num_open_tags > 0) {
-      GST_LOG ("adding missing closing tag '%s'", g_ptr_array_index (open_tags,
-              num_open_tags - 1));
+      GST_LOG ("adding missing closing tag '%s'",
+          (char *) g_ptr_array_index (open_tags, num_open_tags - 1));
       g_string_append_c (s, '<');
       g_string_append_c (s, '/');
       g_string_append (s, g_ptr_array_index (open_tags, num_open_tags - 1));