server: Fixed a shadowed variable.

include/libssh/server.h

@@ -159,7 +159,7 @@ LIBSSH_API int ssh_message_service_reply_success(ssh_message msg);
 LIBSSH_API char *ssh_message_service_service(ssh_message msg);
 
 LIBSSH_API void ssh_set_message_callback(ssh_session session,
-    int(*ssh_message_callback)(ssh_session session, ssh_message msg, void *data),
+    int(*ssh_bind_message_callback)(ssh_session session, ssh_message msg, void *data),
     void *data);
 LIBSSH_API int ssh_execute_message_callbacks(ssh_session session);
 

libssh/server.c

@@ -1133,9 +1133,10 @@ char *ssh_message_channel_request_subsystem(ssh_message msg){
  * @param[in] data void pointer to be passed to callback functions
  */
 void ssh_set_message_callback(ssh_session session,
-    int(*ssh_message_callback_)(ssh_session session, ssh_message msg, void *data), void *data){
+        int(*ssh_bind_message_callback)(ssh_session session, ssh_message msg, void *data),
-  session->ssh_message_callback=ssh_message_callback_;
+        void *data) {
-  session->ssh_message_callback_data=data;
+  session->ssh_message_callback = ssh_bind_message_callback;
+  session->ssh_message_callback_data = data;
 }
 
 int ssh_execute_message_callbacks(ssh_session session){