Defined plurals (as explained by Fabio)

view/fr/messages.po

@@ -16,7 +16,7 @@ msgstr ""
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"Plural-Forms: nplurals=INTEGER; plural=EXPRESSION;\n"
+"Plural-Forms: nplurals=2; plural=(n!=0);\n"
 "X-Language: fr_FR\n"
 
 #: ../../include/auth.php:27

view/fr/strings.php

@@ -1,7 +1,7 @@
 <?php
 
 function string_plural_select($n){
-	return ;
+	return ($n!=0);
 }
 ;
 $a->strings["Logged out."] = "Déconnecté.";