[gnome-games] chess: Remove vala generated files on clean

[Robert Ancell <rancell src gnome org>]

commit f5bf052711d11da60d9ac4c3e83c8c26cb6b9aed
Author: Robert Ancell <robert ancell canonical com>
Date:   Tue Feb 22 10:44:11 2011 +1100

    chess: Remove vala generated files on clean

 glchess/src/Makefile.am |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/glchess/src/Makefile.am b/glchess/src/Makefile.am
index 2621357..5925031 100644
--- a/glchess/src/Makefile.am
+++ b/glchess/src/Makefile.am
@@ -68,6 +68,8 @@ glchess_VALAFLAGS = \
     --pkg posix \
     --pkg sqlite3
 
+CLEANFILES = $(patsubst %.vala,%.c,$(filter %.vala, $(SOURCES))) glchess_vala.stamp
+
 DISTCLEANFILES = \
 	Makefile.in