Fixed unreached code, deprecated fopen(), unused arguments, and other warnings with MSVC

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@2407 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjlib/src/pjlib-test/udp_echo_srv_ioqueue.c b/pjlib/src/pjlib-test/udp_echo_srv_ioqueue.c
index f23350e..8646985 100644
--- a/pjlib/src/pjlib-test/udp_echo_srv_ioqueue.c
+++ b/pjlib/src/pjlib-test/udp_echo_srv_ioqueue.c
@@ -150,7 +150,7 @@
         timeout.sec = 0; timeout.msec = 10;
         rc = pj_ioqueue_poll(ioqueue, &timeout);
     }
-    return 0;
+    PJ_UNREACHED(return 0;)
 }
 
 int udp_echo_srv_ioqueue(void)