xdel(winsid()); clf; findobj("toto") => "Undefined variable: propertyValue" instead of []

Reported by Samuel GOUGEON (@sgougeon)

BUG DESCRIPTION:
----------------
There are two issues:
a) 
--> xdel(winsid()); clf; 
--> findobj("toto")
at line    45 of function findobj ( SCI\modules\gui\macros\findobj.sci line 57 )

Undefined variable: propertyValue

b) http://mailinglists.scilab.org/Users-fr-findobj-tt4036787.html#a4036789
This one is a direct consequence of the bug 15073. Fixing the bug 15073 will fix it.

ERROR LOG:
----------
Undefined variable: propertyValue


HOW TO REPRODUCE THE BUG:
-------------------------
xdel(winsid()); clf;
findobj("toto")

OTHER INFORMATION:
------------------
Occurs since Scilab 5.5.0

added 5.5.2 Bugzilla GUI Minor labels

By Samuel GOUGEON (@sgougeon)

Proposed fix on review @​​ https://gitlab.com/scilab/legacy_codereview/-/wikis/changes/19380/

By Antoine ELIAS (@antoine.elias)

Merged @​​ b3b0fd2c

closed

mentioned in issue #15073

assigned to @sgougeon