[planner] Add valgrind.h to Makefile to fix distcheck

[Alexandre Franke <afranke src gnome org>]

commit 5cdc16b7603a4e1214a80ba1208298392cb546b6
Author: Alexandre Franke <alexandre franke gmail com>
Date:   Mon Jul 4 15:49:15 2011 +0200

    Add valgrind.h to Makefile to fix distcheck

 src/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 2d08246..1d0e4e7 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -73,6 +73,7 @@ libplannerapp_la_SOURCES = 			\
 	planner-phase-dialog.h		\
 	planner-plugin.c		\
 	planner-plugin.h		\
+	valgrind.h			\
 	planner-plugin-loader.c		\
 	planner-plugin-loader.h		\
 	planner-popup-button.c		\