$NetBSD: patch-src_zm_comms_cpp,v 1.2 2013/03/24 16:47:47 joerg Exp $

Don't attempt to include headers that don't exist.

--- src/zm_comms.cpp.orig	2011-06-21 09:19:10.000000000 +0000
+++ src/zm_comms.cpp
@@ -25,7 +25,9 @@
 #include <fcntl.h>
 #include <stdarg.h>
 //#include <memory.h>
+#ifdef HAVE_ALLOCA_H
 #include <alloca.h>
+#endif
 #include <string.h>
 //#include <unistd.h>
 #include <sys/ioctl.h>