diet does not work well with ccache (missing quoting somewhere)

--- util-vserver-0.30.216-pre3034/Makefile.am~	2012-10-28 14:16:40.000000000 +0200
+++ util-vserver-0.30.216-pre3034/Makefile.am	2012-10-28 14:37:18.207577514 +0200
@@ -91,7 +91,7 @@
 AM_INSTALLCHECK_STD_OPTIONS_EXEMPT =
 
 if USE_DIETLIBC
-DIET_CC		       :=  $(DIET) $(DIETFLAGS) $(CC)
+DIET_CC		       :=  $(DIET) $(DIETFLAGS) $(filter-out ccache,$(CC))
 VSERVER_LDFLGS	       :=  -static
 else
 VSERVER_LDFLGS	       :=