Bring system icon into XDG compliance

diff --git a/knetworkmanager-0.8/src/knetworkmanager-wireless_menuitem.cpp b/knetworkmanager-0.8/src/knetworkmanager-wireless_menuitem.cpp
index 6b82e52..13366f5 100644
--- a/knetworkmanager-0.8/src/knetworkmanager-wireless_menuitem.cpp
+++ b/knetworkmanager-0.8/src/knetworkmanager-wireless_menuitem.cpp
@@ -135,7 +135,7 @@
 	}
 
 	if (_adhoc) {
-		TQPixmap pmAdHoc = SmallIcon ("system", TQIconSet::Automatic);
+		TQPixmap pmAdHoc = SmallIcon ("computer", TQIconSet::Automatic);
 		p->drawPixmap (parent->sizeHint ().width () - pbarStrength->width () - _space - pmAdHoc.size ().width () - spacer - 6, y + _border, pmAdHoc);
 	}