MINOR: buffer: remove bo_ptr()
It was replaced by co_head() when a channel was known, otherwise b_head().
diff --git a/src/mux_h2.c b/src/mux_h2.c
index b7b98aa..afd33cb 100644
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -2969,7 +2969,7 @@
* block does not wrap and we can safely read it this way without
* having to realign the buffer.
*/
- ret = h1_headers_to_hdr_list(bo_ptr(buf), bo_ptr(buf) + buf->o,
+ ret = h1_headers_to_hdr_list(b_head(buf), b_head(buf) + buf->o,
list, sizeof(list)/sizeof(list[0]), h1m);
if (ret <= 0) {
/* incomplete or invalid response, this is abnormal coming from