[gimp] configure: minor alignment fix of option description.

[Jehan Pagès <jehanp src gnome org>]

commit 2781450c3bad1238267dc237474f226165f1a141
Author: Jehan <jehan girinstud io>
Date:   Thu Jun 2 01:24:10 2016 +0200

    configure: minor alignment fix of option description.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d4c4adf..518b485 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1831,7 +1831,7 @@ fi
 
 have_email="no (xdg-email not found)"
 
-AC_ARG_WITH(sendmail,[  --with-sendmail[=DIR]   use sendmail instead of xdg-email])
+AC_ARG_WITH(sendmail,[  --with-sendmail[=DIR]     use sendmail instead of xdg-email])
 
 have_sendmail=no
 # Sendmail must be explicitely enabled to replace xdg-email implementation.