* include/functions_db.php: added in function "get_agent_modules" the
default value null for get modules of agents in user's group.
* godmode/massive/massive_delete_modules.php: fixed the select of modules
now get only the modules of agents in user's group and now you can delete
and view correcly the modules with acent or other not ascii characters.
Fixes: #3182143 and #3175722
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@3849 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f