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

Signed-off-by: Elijah Newren <newren@gmail.com>
Acked-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/diff.c b/diff.c
index f8e0d3b..fa86d02 100644
--- a/diff.c
+++ b/diff.c
@@ -31,6 +31,7 @@
 #include "graph.h"
 #include "oid-array.h"
 #include "packfile.h"
+#include "pager.h"
 #include "parse-options.h"
 #include "help.h"
 #include "promisor-remote.h"