Make incrementing in command line parser start from 0, not default.

This fixes an issue in MythShutdown where telling it to check the
recording status would actually have an opposite effect of ignoring it.

mythtv/libs/libmythbase/mythcommandlineparser.cpp

@@ -395,7 +395,7 @@ bool CommandLineArg::Set(QString opt)
 
       case QVariant::Int:
         if (m_stored.isNull())
-            m_stored = QVariant(m_default.toInt() + 1);
+            m_stored = QVariant(1);
         else
             m_stored = QVariant(m_stored.toInt() + 1);
         break;