atomsSystemUpdate() can no more be run in -nwni mode.

Bug Description

atomsSystemUpdate() can no more be run in -nwni mode.

Steps to reproduce

atomsSystemUpdate()

What is the expected correct behavior?

No error. Back to Scilab 6.1.1 behavior.

Error log

--> atomsSystemUpdate()
at line    17 of function atomsSystemUpdate ( E:\WS\scilab\minor-dev\scilab\modules\atoms\macros\atomsSystemUpdate.sci line 32 )

Scilab 'get' function disabled in -nogui or -nwni mode.

Problem appeared after !194 (merged) merge.