[devel] Revised Makefile.in to account for mkinstalldirs being removed

and re-removed mkinstalldirs.
diff --git a/CHANGES b/CHANGES
index 9baf2d3..d61b47b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3041,12 +3041,13 @@
   Fixed problem with symbols creation in Makefile.am which was assuming that
     all versions of ccp write to standard output by default (Martin Banky). The
     bug was introduced in libpng-1.2.9beta5.
+  Removed unused mkinstalldirs.
 
 Version 1.5.0beta49 [October 8, 2010]
   Undid Makefile.am revision of 1.5.0beta48.
 
 Version 1.5.0beta50 [October 8, 2010]
-  Restored mkinstalldirs which was removed from version 1.5.0beta48.
+  Revised Makefile.in to account for mkinstalldirs being removed.
 
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