Do not show messages about invalid geometries

By setting message level in copy thread.

Author: joto

src/db-copy.cpp

@@ -129,6 +129,10 @@ void db_copy_thread_t::thread_t::operator()()
         // Let commits happen faster by delaying when they actually occur.
         m_conn->exec("SET synchronous_commit = off");
 
+        // Do not show messages about invalid geometries (they are removed
+        // by the trigger).
+        m_conn->exec("SET client_min_messages = WARNING");
+
         bool done = false;
         while (!done) {
             std::unique_ptr<db_cmd_t> item;