Don't use malloc.h header on OpenBSD.

--- oledecod.c.orig	Wed Oct 27 11:49:16 1999
+++ oledecod.c	Mon Nov  3 23:04:07 2014
@@ -39,7 +39,6 @@
 #include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
-#include <malloc.h>
 #include <ctype.h>
 #include <sys/types.h>
 #include <assert.h>
@@ -137,7 +136,7 @@ __OLEdecode (char *OLEfilename, pps_entry ** stream_li
   verbose ("fast testing type of file");
   test_exitf ((c = getc (input)) != EOF, 5, ends ());
   test_exitf (ungetc (c, input) != EOF, 5, ends ());
-  test_exitf (!isprint (c), 8, ends ());
+  /*  test_exitf (!isprint (c), 8, ends ()); */
   test_exitf (c == 0xd0, 9, ends ());
 
   /* read header block */
