Fix temporary uses when ConstAlias needed.

[rolanddenis]

PR Description

Fix temporary uses when ConstAlias is needed. It is related to DGtal-team/DGtal#1140 and DGtal-team/DGtal#1141

Checklist

• [N/A] Doxygen documentation of the code completed (classes, methods, types, members...)
• [N/A] Check if it follows the tools structure described in CONTRIBUTING.md
• New entry in the ChangeLog.md added.
• [N/A] Update the readme with potentially a screenshot of the tools if it applies.
• No warning raised in Debug cmake mode (otherwise, Travis C.I. will fail).

[kerautret]

thanks a lot @rolanddenis all looks fine!
merging..