MINOR: check: export wake_srv_chk()

We'll need it to centralize the stream connectors definitions.
diff --git a/include/haproxy/check.h b/include/haproxy/check.h
index f631c30..eb89951 100644
--- a/include/haproxy/check.h
+++ b/include/haproxy/check.h
@@ -82,6 +82,7 @@
 const char *init_check(struct check *check, int type);
 void free_check(struct check *check);
 void check_purge(struct check *check);
+int wake_srv_chk(struct stconn *cs);
 
 int init_srv_check(struct server *srv);
 int init_srv_agent_check(struct server *srv);
diff --git a/src/check.c b/src/check.c
index 5731439..e93e50b 100644
--- a/src/check.c
+++ b/src/check.c
@@ -140,7 +140,6 @@
 INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);
 
 
-static int wake_srv_chk(struct stconn *cs);
 struct data_cb check_conn_cb = {
 	.wake = wake_srv_chk,
 	.name = "CHCK",
@@ -1016,7 +1015,7 @@
  * It returns 0 on normal cases, <0 if at least one close() has happened on the
  * connection (eg: reconnect). It relies on tcpcheck_main().
  */
-static int wake_srv_chk(struct stconn *cs)
+int wake_srv_chk(struct stconn *cs)
 {
 	struct connection *conn;
 	struct check *check = __cs_check(cs);