[PATCH] BUG: payload: fix payload not retrieving arbitrary lengths

[Felipe Guerreiro Barbosa Ruiz]

This fixes a regression introduced in d7bdcb874bcb, that removed the
ability to use req.payload(0,0) to read the whole buffer content. The
offending commit is present starting in version 1.6, so the patch
should be backported to versions 1.6 and 1.7.
---
 src/payload.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/payload.c b/src/payload.c
index a02a8696..b80a19c9 100644
--- a/src/payload.c
+++ b/src/payload.c
@@ -838,7 +838,7 @@ smp_fetch_payload(const struct arg *arg_p, struct
sample *smp, const char *kw, v
                return 0;

        chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ?
&smp->strm->res : &smp->strm->req;
-       if (!buf_size || buf_size > global.tune.bufsize || buf_offset +
buf_size > global.tune.bufsize) {
+       if (buf_size > global.tune.bufsize || buf_offset + buf_size >
global.tune.bufsize) {
                /* will never match */
                smp->flags = 0;
                return 0;