Poll the frontend before the DVR

This is in order to get the "lock" message before PAT and PMTs.

dvb.c

@@ -158,6 +158,9 @@ block_t *dvb_Read( mtime_t i_poll_timeout )
         return NULL;
     }
 
+    if ( ufds[1].revents )
+        FrontendPoll();
+
     if ( ufds[0].revents )
     {
         p_blocks = DVRRead();
@@ -188,9 +191,6 @@ block_t *dvb_Read( mtime_t i_poll_timeout )
         }
     }
 
-    if ( ufds[1].revents )
-        FrontendPoll();
-
     if ( i_frontend_timeout && i_wallclock > i_frontend_timeout )
     {
         if ( i_quit_timeout_duration )