Fix an issue created by commit 9e3362d1.

the issue was the graphic cursor was locked on the first snap point
in route mode, once a snap point is found.

pcbnew/router/pns_tool_base.cpp

@@ -279,7 +279,7 @@ void TOOL_BASE::updateStartItem( const TOOL_EVENT& aEvent, bool aIgnorePads )
     else
         p = cp;
 
-    m_startItem = pickSingleItem( cp, -1, -1, aIgnorePads );
+    m_startItem = pickSingleItem( aEvent.IsClick() ? cp : p, -1, -1, aIgnorePads );
 
     if( !m_gridHelper->GetUseGrid() && m_startItem && !m_startItem->Layers().Overlaps( tl ) )
         m_startItem = nullptr;