Revert bad fix.

Unit tests are back ok (when tag is @6 or @=, yearoffset
is not zero but must not be applied when replacing yyyy). 
Compatibility with 3.2 is also restored.

htdocs/core/lib/functions2.lib.php

@@ -810,20 +810,18 @@ function get_next_value($db,$mask,$table,$field,$where='',$objsoc='',$date='',$m
         $numFinal = $mask;
 
         // We replace special codes except refclient
-        // FIXME: $yearoffset is 0 by default, this code is useless
-		//if (! empty($yearoffsettype) && ! is_numeric($yearoffsettype) && $yearoffsettype != '=')	// yearoffsettype is - or +, so we don't want current year
-		//{
+		if (! empty($yearoffsettype) && ! is_numeric($yearoffsettype) && $yearoffsettype != '=')	// yearoffsettype is - or +, so we don't want current year
+		{
 	        $numFinal = preg_replace('/\{yyyy\}/i',date("Y",$date)+$yearoffset, $numFinal);
         	$numFinal = preg_replace('/\{yy\}/i',  date("y",$date)+$yearoffset, $numFinal);
         	$numFinal = preg_replace('/\{y\}/i',   substr(date("y",$date),2,1)+$yearoffset, $numFinal);
-		//}
-		/*
+		}
 		else	// we want yyyy to be current year
 		{
         	$numFinal = preg_replace('/\{yyyy\}/i',date("Y",$date), $numFinal);
         	$numFinal = preg_replace('/\{yy\}/i',  date("y",$date), $numFinal);
         	$numFinal = preg_replace('/\{y\}/i',   substr(date("y",$date),2,1), $numFinal);
-		}*/
+		}
         $numFinal = preg_replace('/\{mm\}/i',  date("m",$date), $numFinal);
         $numFinal = preg_replace('/\{dd\}/i',  date("d",$date), $numFinal);