Installation reports that archive extraction has failed and stops installing, although the unzipped dir is OK
#### Reported by **Samuel GOUGEON** (@sgougeon)
```
BUG DESCRIPTION:
----------------
When installing scilib_geo from scratch (no former installation or scilib_geo dir in SCI/contrib), the download is OK but then an error message is displayed
* in console: atomsExtract: The extraction of the archive 'C:\PROGRA~1\scilab\SCILAB~1.2-2\contrib\scilib_geo\scilib_geo_0.5.59.1-1.bin.zip' has failed.
* in a message box: Installation failed!
Yet, when going to SCI/contrib, the unzipped scilib_geo_0.5.59.1 directory is available with its files.
Then, the list returned by atomsGetInstalled does not show scilib_geo, even after restarting Scilab.
ERROR LOG:
----------
atomsExtract: The extraction of the archive 'C:\PROGRA~1\scilab\SCILAB~1.2-2\contrib\scilib_geo\scilib_geo_0.5.59.1-1.bin.zip' has failed.
HOW TO REPRODUCE THE BUG:
-------------------------
atomsInstall scilib_geo
atomsGetInstalled
```
issue