ImageJ Launcher (macosx): discover bundled Java3D again
ImageJ Launcher (macosx): discover bundled Java3D again

The location used to be hardcoded, but we got rid of all command-line
defines. So let's discover the ext directory now.

This has been backported to fiji.git on Tue Mar 27 06:02:05 2012 -0500.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

This used to be revision r5197.

biovoxxel/imagej,biovoxxel/imagej,TehSAUCE/imagej,TehSAUCE/imagej,biovoxxel/imagej,TehSAUCE/imagej