xdiff: reference util.h in parent directory

Although CMake will correctly configure include directories for us,
some people may use their own build system, and we should reference
`util.h` based on where it actually lives.

diff --git a/src/xdiff/xdiff.h b/src/xdiff/xdiff.h
index db5d59884a464d3f58d7219974ea1882a1e855ed..f08f72e16a39aec40c8d488d020c9bffa55cb1d5 100644 (file)
--- a/src/xdiff/xdiff.h
+++ b/src/xdiff/xdiff.h
@@ -20,7 +20,7 @@
  *
  */
 
-#include "util.h"
+#include "../util.h"
 
 #if !defined(XDIFF_H)
 #define XDIFF_H