t9010-*.sh: skip all tests if the PIPE prereq is missing

diff --git a/graph.c b/graph.c
index 8b9049dd2c725f58314042deebfb69030e4321d3..e7e20650da6983ada7c94c22aea7ecaec41c5c17 100644 (file)
--- a/graph.c
+++ b/graph.c
@@ -1,4 +1,5 @@
 #include "cache.h"
+#include "config.h"
 #include "commit.h"
 #include "color.h"
 #include "graph.h"