[passepartout] fix compile error on Mandrake Cooker (fixes #464309)

[Sven Herzberg <herzi src gnome org>]

commit f8d46e0abc635a430e3fd1afcbea84f56ec2f1f1
Author: Sven Herzberg <herzi gnome-de org>
Date:   Tue Aug 7 23:56:23 2007 +0000

    fix compile error on Mandrake Cooker (fixes #464309)
    
    2007-08-08  Sven Herzberg  <herzi gnome-de org>
    
    	* src/ps/misc.h: fix compile error on Mandrake Cooker (fixes #464309)
    
    git-svn-id: http://svn.gnome.org/svn/passepartout/trunk 1522 910bfebc-b532-0410-a802-fb3981afa09c
---
 src/ps/misc.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/ps/misc.h b/src/ps/misc.h
index 1560898..7e77815 100644
--- a/src/ps/misc.h
+++ b/src/ps/misc.h
@@ -19,6 +19,7 @@ namespace PS {
     const Matrix& matrix;
   };
   
+  std::ostream& operator << (std::ostream& out, const Concat& c);
 }
 
 #endif