fixed possible bugs with user-defined chars (clear high bits)
thanks to Andy Baxter for debugging the MilfordInstruments driver!
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@449 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
fixed bug in Milford Instruments driver which drew extra graphics chars in
odd places when drawing double bars. (the display doesn't like it if you put
the escape character 0xfe inside a define char sequence).
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@448 3ae390bd-cb1e-0410-b409-cd5a39f66f1f