Fix: [bug #856] Mail error if destination user doesn't have an email
Merge pull request #896 from marcosgdf/bug-856

Fix: [bug #856] Mail error if destination user doesn't have an email
Fix: [ bug #855 ] Holiday approval email in French
Fix: [ bug #855 ] Holiday approval email in French
Merge remote-tracking branch 'origin/3.3' into develop

Conflicts:
	htdocs/holiday/fiche.php