Change the block enums so zero is No_Block.  Update CHANGES.
diff --git a/CHANGES b/CHANGES
index 95632ed..b4d6e95 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,9 +1,18 @@
+Changes in version 0.2.2-5.0.0:
+
+- Remove unused files, thus reducing the size of the source.
+- Change the block enums (enum unicode_block) so that zero is
+  No_Block.  THIS IS A BINARY INCOMPATIBLE CHANGE.  If this causes
+  anyone grief, *PLEASE* let me know.
+
+
 Changes in version 0.2.1-5.0.0:
 
 - The C standard permits an enumeration to have tags with duplicate
   value (ISO/IEC 9899:1999 (E) 6.7.2.2.3), so when there are both long
   and short forms of the same name, include both in the header file.
 
+
 Changes in version 0.2-5.0.0:
 
 - Updated UCD to version 5.0.0 from the Unicode Consortium.
diff --git a/enum.list b/enum.list
index a2a331e..600c423 100644
--- a/enum.list
+++ b/enum.list
@@ -30,6 +30,7 @@
 
 # Block (blk) long
 
+blk; n/a       ; No_Block
 blk; n/a       ; Aegean_Numbers
 blk; n/a       ; Alphabetic_Presentation_Forms
 blk; n/a       ; Ancient_Greek_Musical_Notation
@@ -131,7 +132,6 @@
 blk; n/a       ; Musical_Symbols
 blk; n/a       ; Myanmar
 blk; n/a       ; New_Tai_Lue
-blk; n/a       ; No_Block
 blk; n/a       ; Number_Forms
 blk; n/a       ; Ogham
 blk; n/a       ; Old_Italic