Change scale of chclass penalty from rpstep to rppenstep

Irpg/Main.pm

@@ -158,7 +158,7 @@ sub penalize {
         $pen_key = 'pen_title';
     }
     elsif ($type eq "chclass") {
-        $pen = int($opts->{rpbase} * ($opts->{rpstep}**$rps->{$username}{level}));
+        $pen = int($opts->{rpbase} * ($opts->{rppenstep}**$rps->{$username}{level}));
         $reason = 'training';
         $pen_key = 'pen_class';
     }