Fix type mismatch.

--- atftp-0.7.git20120829-1/tftp_io.c	2012-08-20 16:26:20.000000000 +0100
+++ atftp-0.7.git20120829-1/tftp_io.c	2025-07-04 17:23:36.883111619 +0100
@@ -320,7 +320,7 @@
                memcpy(sa_from, &from, sizeof(from));
 
           /* if sa as never been initialised, port is still 0 */
-          if (sockaddr_get_port(&sa) == 0)
+          if (sockaddr_get_port(sa) == 0)
                memcpy(sa, &from, sizeof(from));