Add errno.h include since it was removed from swab.h.

git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@1159 fd59a12c-fef9-0310-b244-a6a79926bd2f

exec/totempg.c

@@ -88,6 +88,7 @@
 #include <string.h>
 #include <assert.h>
 #include <pthread.h>
+#include <errno.h>
 
 #include "../include/hdb.h"
 #include "../include/list.h"