Debugger: Fix passing connection when starting from commandline

This fixes a regression when starting debugging from the command line
using 'qtcreator -debug /some/binary,server="localhost:1234"'. The
parameters have been parsed correctly, but were later overwritten
by data from the default (desktop) "device".

Change-Id: I7747eaec6479e55cc18ea21ab1233e89ee9b119a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/debugger/debuggerplugin.cpp

@@ -693,7 +693,9 @@ bool fillParameters(DebuggerStartParameters *sp, const Kit *kit /* = 0 */, QStri
     IDevice::ConstPtr device = DeviceKitInformation::device(kit);
     if (device) {
         sp->connParams = device->sshParameters();
-        sp->remoteChannel = sp->connParams.host + QLatin1Char(':') + QString::number(sp->connParams.port);
+        // Could have been set from command line.
+        if (sp->remoteChannel.isEmpty())
+            sp->remoteChannel = sp->connParams.host + QLatin1Char(':') + QString::number(sp->connParams.port);
     }
     return true;
 }