pgsql: Support spurious syncs in a stashed queue.

lib/modules/Sql.pmod/pgsql.pike

@@ -1327,7 +1327,7 @@ private int reconnect() {
     catch(c->close());
     unnamedstatement = 0;
     termlock = 0;
-    destruct(c);
+    catch(destruct(c));
     PD("Flushing old cache\n");
     foreach(_prepareds;;mapping tp)
       m_delete(tp,"preparedname");

lib/modules/Sql.pmod/pgsql_util.pmod

@@ -189,16 +189,15 @@ class bufcon {
 
   final void sendcmd(int mode,void|sql_result portal) {
     Thread.MutexKey lock=realbuffer->shortmux->lock();
-    if(portal) {
+    if (portal)
       realbuffer->stashqueue->write(portal);
     if (mode == SYNCSEND) {
       add(PGSYNC);
       realbuffer->stashqueue->write(1);
       mode = SENDOUT;	    // Demote it to prevent an extra SYNC upon stashflush
     }
-    }
     realbuffer->stash->add(this);
-    PD("%d>Got stash mode %d > %d\n",
+    PD("%d>Stashed mode %d > %d\n",
      realbuffer->socket->query_fd(), mode, realbuffer->stashflushmode);
     if (mode > realbuffer->stashflushmode)
       realbuffer->stashflushmode = mode;
@@ -387,7 +386,6 @@ outer:
             PD("%d>Skip flush %d Queue %O\n",
              socket->query_fd(), mode, (string)this);
             break outer;
-          case FLUSHLOGSEND:
           case FLUSHSEND:
             PD("Flush\n");
             add(PGFLUSH);