Serial port enumerator tiny bug

[behines]

I think I found a small bug in ofApp.cpp where it fills in the serial port list on refresh.

In the code that runs at startup, there's a line
ddl->addToggle(serialDevices[i].getDeviceName().c_str());

But in the code that runs for Refresh, the [i] is hardcoded as [0].
ddl->addToggle(serialDevices[0].getDeviceName().c_str());