sys_nerr is available on MAC so I have put it back

7cf9cc39 · Steven Murray · Steven Murray · e4988b37 · 7cf9cc39
Commit 7cf9cc39 authored Mar 18, 2014 by Steven Murray Committed by Steven Murray Oct 11, 2017
--- a/mediachanger/castorrmc/common/serror.cpp
+++ b/mediachanger/castorrmc/common/serror.cpp
@@ -19,7 +19,7 @@

 #include <string.h>

-#if !defined(linux) && !defined(__APPLE__) 
+#if !defined(linux)
 extern int      sys_nerr;       /* number of system error messages      */
 #endif