Make traces work with multiple threads, I think.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4184 ed5197a5-7fde-0310-b194-c3ffbd925b24

src/ssb.c

@@ -2149,6 +2149,7 @@ sqlite3* tf_ssb_acquire_db_reader(tf_ssb_t* ssb)
 	{
 		sqlite3_open_v2(ssb->db_path, &db, SQLITE_OPEN_READONLY, NULL);
 		tf_ssb_db_init_reader(db);
+		tf_trace_sqlite(ssb->trace, db);
 	}
 	uv_mutex_unlock(&ssb->db_readers_lock);
 	return db;