[jit.cellblock] read/write

[jit.cellblock]'s read and write methods seem to have been
reintroduced during my holidays.
Unfortunately, I cannot reload a file with "read" (no argument) if its
name doesn't end with a text extension (like txt, or mxt).

Max504, OSX.5.4.

Here is a simple patch:

_____________________________
Patrick Delges

Centre de Recherches et de Formation Musicales de Wallonie asbl
http://www.crfmw.be/max