customize.texi (Composite Types): Lower-case index entry.

doc/lispref/ChangeLog

 2010-11-12  Eli Zaretskii  <eliz@gnu.org>
 
+	* customize.texi (Composite Types): Lower-case index entry.
+
 	* loading.texi (How Programs Do Loading): Document
 	load-file-name.  (Bug#7346)
 

doc/lispref/customize.texi

@@ -733,7 +733,7 @@ The value must be a valid color name, and you can do completion with
 
 @node Composite Types
 @subsection Composite Types
-@cindex Composite Types (customization)
+@cindex composite types (customization)
 
   When none of the simple types is appropriate, you can use composite
 types, which build new types from other types or from specified data.