MINOR: build: fix build dependency
fix include dependency. The header file sample.h don't need to known
the content of the struct arg, so I remove the include, and replace
it by a simple pointer declaration.
This prevent an include dependecy issue with the next patch.
diff --git a/include/types/sample.h b/include/types/sample.h
index 2f3cfbf..22dfe59 100644
--- a/include/types/sample.h
+++ b/include/types/sample.h
@@ -28,9 +28,10 @@
#include <common/chunk.h>
#include <common/mini-clist.h>
-#include <types/arg.h>
#include <types/proto_http.h>
+struct arg;
+
/* input and output sample types */
enum {
SMP_T_ANY = 0, /* any type */