ws.h: move declarations for ws.c functions from cache.h

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/diff.c b/diff.c
index e697f78..73d2ac0 100644
--- a/diff.c
+++ b/diff.c
@@ -41,6 +41,7 @@
 #include "object-name.h"
 #include "setup.h"
 #include "strmap.h"
+#include "ws.h"
 #include "wrapper.h"
 
 #ifdef NO_FAST_WORKING_DIRECTORY