Remove dummy argument from BIO_get_bind_mode

Reviewed-by: NAndy Polyakov <appro@openssl.org>

doc/crypto/BIO_s_accept.pod

@@ -21,7 +21,7 @@ BIO_get_bind_mode, BIO_do_accept - accept BIO
  long BIO_set_accept_bios(BIO *b, char *bio);
 
  long BIO_set_bind_mode(BIO *b, long mode);
- long BIO_get_bind_mode(BIO *b, long dummy);
+ long BIO_get_bind_mode(BIO *b);
 
  #define BIO_BIND_NORMAL		0
  #define BIO_BIND_REUSEADDR_IF_UNUSED	1

include/openssl/bio.h

@@ -481,7 +481,7 @@ struct bio_dgram_sctp_prinfo {
 # define BIO_BIND_REUSEADDR_IF_UNUSED    1
 # define BIO_BIND_REUSEADDR              2
 # define BIO_set_bind_mode(b,mode) BIO_ctrl(b,BIO_C_SET_BIND_MODE,mode,NULL)
-# define BIO_get_bind_mode(b,mode) BIO_ctrl(b,BIO_C_GET_BIND_MODE,0,NULL)
+# define BIO_get_bind_mode(b)    BIO_ctrl(b,BIO_C_GET_BIND_MODE,0,NULL)
 
 # define BIO_do_connect(b)       BIO_do_handshake(b)
 # define BIO_do_accept(b)        BIO_do_handshake(b)