src/closures.c (selinux_enabled_check): Fix strncmp usage bug.

http://github.com/atgreen/libffi/commit/eaf444eabc4c78703c0f98ac0197b1619c1b1bef

--- src/closures.c
+++ src/closures.c
@@ -146,7 +146,7 @@
       p = strchr (p + 1, ' ');
       if (p == NULL)
         break;
-      if (strncmp (p + 1, "selinuxfs ", 10) != 0)
+      if (strncmp (p + 1, "selinuxfs ", 10) == 0)
         {
           free (buf);
           fclose (f);