example: Fixed build of samplesshd.

examples/samplesshd.c

@@ -205,8 +205,8 @@ int main(int argc, char **argv){
       printf("error accepting a connection : %s\n",ssh_get_error(sshbind));
       return 1;
     }
-    if (ssh_bind_accept(session)) {
-        printf("ssh_bind_accept: %s\n", ssh_get_error(session));
+    if (ssh_handle_key_exchange(session)) {
+        printf("ssh_handle_key_exchange: %s\n", ssh_get_error(session));
         return 1;
     }
     do {