MINOR: connection: unconst mux's get_fist_cs() callback function
This change is mandatory for next commits.
diff --git a/src/mux_h1.c b/src/mux_h1.c
index d7fd3da..eeb9bad 100644
--- a/src/mux_h1.c
+++ b/src/mux_h1.c
@@ -3320,7 +3320,7 @@
/* Retrieves a valid conn_stream from this connection, or returns NULL. For
* this mux, it's easy as we can only store a single conn_stream.
*/
-static const struct conn_stream *h1_get_first_cs(const struct connection *conn)
+static struct conn_stream *h1_get_first_cs(const struct connection *conn)
{
struct h1c *h1c = conn->ctx;
struct h1s *h1s = h1c->h1s;