[mythtv] PATCH: Tidy up backend status DVB formatting

[Martin Smith]

Hi,

This trivial patch adds a check I missed in my original patch a while back. It
stops it printing lines of recording time info when there's no corresponding
data on siqnal quality in the database.

Martin

--- programs/mythbackend/mainserver.cpp 10 Apr 2004 19:31:58 -0000      1.131
+++ programs/mythbackend/mainserver.cpp 26 Apr 2004 18:53:35 -0000
@@ -2672,7 +2672,7 @@
                 cout << query.lastError().databaseText() << "\r\n"
                      << query.lastError().driverText() << "\r\n";

-            if (query.isActive())
+            if (query.isActive() && query.numRowsAffected())
             {
                 os << "<br>Recording period from " << t_start.toString() <<
                     " to " << t_end.toString() <<