correct ifdef that must be ifndef because under FreeBSD alloca.h is in stdlib.h

git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@1468 fd59a12c-fef9-0310-b244-a6a79926bd2f

exec/totemsrp.c

@@ -48,7 +48,7 @@
  *   usage on 1.6ghz xeon from 35% to less then .1 % as measured by top
  */
 
-#ifdef OPENAIS_BSD
+#ifndef OPENAIS_BSD
 #include <alloca.h>
 #endif