#2 patch for Alt-Gr character with latin keyboard layout

[Patrice Tisserand]

This patch will fix issue with character available via Alt-Gr on a
latin keyboard lyaout (e.g: '~', '#', '{','[' ...).

Note that this bug have been found on Windows XP but can occur
on other platform too.

To apply this patch:
$ cd jmax
$ patch -p0 < patch_editfield.java.txt

[Patrice Tisserand]

Patch for java/src/ircam/jmax/editors/patcher/EditField.java