trivial style fix in bindings
diff --git a/cryptography/hazmat/bindings/openssl/ssl.py b/cryptography/hazmat/bindings/openssl/ssl.py
index ab453d0..165bc7a 100644
--- a/cryptography/hazmat/bindings/openssl/ssl.py
+++ b/cryptography/hazmat/bindings/openssl/ssl.py
@@ -374,7 +374,7 @@
*/
int SSL_CTX_set_alpn_protos(SSL_CTX *, const unsigned char*, unsigned);
int SSL_set_alpn_protos(SSL *, const unsigned char*, unsigned);
-void SSL_CTX_set_alpn_select_cb(SSL_CTX*,
+void SSL_CTX_set_alpn_select_cb(SSL_CTX *,
int (*) (SSL *,
const unsigned char **,
unsigned char *,
@@ -538,7 +538,7 @@
const unsigned char*,
unsigned) = NULL;
int (*SSL_set_alpn_protos)(SSL *, const unsigned char*, unsigned) = NULL;
-void (*SSL_CTX_set_alpn_select_cb)(SSL_CTX*,
+void (*SSL_CTX_set_alpn_select_cb)(SSL_CTX *,
int (*) (SSL *,
const unsigned char **,
unsigned char *,