bug with port amavis-stats 0.1.2

[Shiemaru]

Hello

add "forward" declaration.

sub err ;

Here is patch.
(LC_ALL=C TZ=UTC0 diff -Naur amavis-stats.orig amavis-stats)

--- amavis-stats.orig   Thu Feb 24 04:47:50 2005
+++ amavis-stats        Sat Sep 10 05:22:36 2005
@@ -96,6 +96,8 @@
 # Subroutines
 # ########################################################################

+sub err;
+
 #
 # Message about this program and how to use it
 #