mod_sofia: fix build error on gcc 4.3 (FSBUILD-105)

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@11334 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/sofia-sip/.update

-Thur Dec 18 17:23:18 CST 2008
+Thur Jan 20 17:23:18 CST 2009

libs/sofia-sip/libsofia-sip-ua/nta/sl_utils_print.c

@@ -218,7 +218,8 @@ issize_t sl_payload_print(FILE *stream, char const *prefix, sip_payload_t const
     crlf = strnspn(s + n, end - s - n, "\r\n");
     if (prefix)
       fputs(prefix, stream), total += strlen(prefix);
-    fwrite(s, 1, n + crlf, stream);
+	if (fwrite(s, 1, n + crlf, stream) < 0)
+		return -1;
     s += n + crlf;
     total += n + crlf;
   }