Debugger: Fix compiler warning

Fix compiler warning about unused variable.

Change-Id: Icb1e6b7d144538fb971f67da75bf9f4e172a4dbf
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/debugger/debuggerengine.cpp

@@ -1413,7 +1413,7 @@ void DebuggerEngine::updateWatchData(const WatchData &, const WatchUpdateFlags &
 {
 }
 
-void DebuggerEngine::watchDataSelected(const QByteArray &iname)
+void DebuggerEngine::watchDataSelected(const QByteArray &)
 {
 }