This prevents a segfault when an Include file does not exist.

diff -Naur acpica-unix2-20160930/source/compiler/aslfiles.c acpica-unix2-20160930-s390/source/compiler/aslfiles.c
--- acpica-unix2-20160930/source/compiler/aslfiles.c	2016-09-30 10:43:56.000000000 -0600
+++ acpica-unix2-20160930-s390/source/compiler/aslfiles.c	2016-12-06 18:55:08.693785207 -0700
@@ -319,7 +319,7 @@
     if (!IncludeFile)
     {
         fprintf (stderr, "Could not open include file %s\n", Pathname);
-        ACPI_FREE (Pathname);
+        /* ACPI_FREE (Pathname); <-- forces free() segfault */
         return (NULL);
     }