Snap for 4551672 from 7c571561be411b54496518fa28a9a99c7a4c83c2 to pi-release

Change-Id: Icbefc07dd189811c9a78138df78d48b64ae2a8a2
diff --git a/MagickCore/magick-baseconfig.h b/MagickCore/magick-baseconfig.h
index 683ad42..24f342e 100644
--- a/MagickCore/magick-baseconfig.h
+++ b/MagickCore/magick-baseconfig.h
@@ -578,9 +578,7 @@
 #endif
 
 /* Define to 1 if you have the `readdir_r' function. */
-#ifndef MAGICKCORE_HAVE_READDIR_R
-#define MAGICKCORE_HAVE_READDIR_R 1
-#endif
+/* #undef MAGICKCORE_HAVE_READDIR_R */
 
 /* Define to 1 if you have the `readlink' function. */
 #ifndef MAGICKCORE_HAVE_READLINK