port setting is now also respected if the port exists but is not detected in...

port setting is now also respected if the port exists but is not detected in scan (for udev symlinks)

pronterface.py

@@ -392,7 +392,7 @@ class PronterWindow(wx.Frame,pronsole.pronsole):
             self.serialport.Clear()
             self.serialport.AppendItems(portslist)
         try:
-            if self.settings.port in scan:
+            if os.path.exists(self.settings.port):
                 self.serialport.SetValue(self.settings.port)
             elif len(portslist)>0:
                 self.serialport.SetValue(portslist[0])