Update to jgraphx-1.4.0.2

[Clément DAVID]

Hello,

Due to some bugs in the 1.4.0.1 (some NPE) [1], we have just increased
the minimal jgraphx dependency to 1.4.0.2 [2].

For any backporting issues, just take a look at the commit [3].

Sorry for any inconvenience.

Don't hesitate if you have any questions,
Clément

[1] http://www.jgraph.com/mxgraphlog.html
[2] http://www.jgraph.com/downloads/jgraphx/archive/jgraphx-1_4_0_2.zip
[3]
http://gitweb.scilab.org/?p=scilab;h=d9bfba1c86ee74821988ac3d0b1bbd492b5613d5