[gimp-perl] Improve "usage" message.

[Ed J <edj src gnome org>]

commit 3f90bc03f6eb90980e294938d50f42643bfbc5cb
Author: Ed J <edj src gnome org>
Date:   Thu May 15 06:08:23 2014 +0100

    Improve "usage" message.

 Gimp.pm |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Gimp.pm b/Gimp.pm
index 148129e..8c7bc00 100644
--- a/Gimp.pm
+++ b/Gimp.pm
@@ -142,7 +142,7 @@ if (@ARGV) {
          if (/^-h$|^--?help$|^-\?$/) {
             $Gimp::help=1;
             print __<<EOF;
-Usage: $0 [gimp-args..] [interface-args..] [script-args..]
+Usage: $basename [gimp-args...] [interface-args...] [script-args...]
        gimp-arguments are
            -h | -help | --help | -?   print some help
            -v | --verbose             be more verbose in what you do