backport upstream-svn4235.patch to fix compile error

debian/patches/series

@@ -1 +1,3 @@
 01-edge.8.diff
+upstream-svn4235.patch
+

debian/patches/upstream-svn4235.patch

@@ -0,0 +1,13 @@
+diff --git a/n2n.c b/n2n.c
+index cfcfb74..ac98ad6 100644
+--- a/n2n.c
++++ b/n2n.c
+@@ -120,7 +120,7 @@ void traceEvent(int eventTraceLevel, char* file, int line, char * format, ...) {
+       }
+ 
+       snprintf(out_buf, sizeof(out_buf), "%s%s", extra_msg, buf);
+-      syslog(LOG_INFO, out_buf);
++      syslog(LOG_INFO, "%s", out_buf);
+     } else {
+       snprintf(out_buf, sizeof(out_buf), "%s [%11s:%4d] %s%s", theDate, file, line, extra_msg, buf);
+       printf("%s\n", out_buf);