Added index entry.
diff --git a/Doc/lib/libzlib.tex b/Doc/lib/libzlib.tex
index d8ecc98..2e76900 100644
--- a/Doc/lib/libzlib.tex
+++ b/Doc/lib/libzlib.tex
@@ -51,6 +51,7 @@
\begin{funcdesc}{crc32}{string\optional{, value}}
Computes a CRC (Cyclic Redundancy Check)%
\index{Cyclic Redundancy Check}
+ \index{checksum!Cyclic Redundancy Check}
checksum of \var{string}. If
\var{value} is present, it is used as the starting value of the
checksum; otherwise, a fixed default value is used. This allows
diff --git a/Doc/libzlib.tex b/Doc/libzlib.tex
index d8ecc98..2e76900 100644
--- a/Doc/libzlib.tex
+++ b/Doc/libzlib.tex
@@ -51,6 +51,7 @@
\begin{funcdesc}{crc32}{string\optional{, value}}
Computes a CRC (Cyclic Redundancy Check)%
\index{Cyclic Redundancy Check}
+ \index{checksum!Cyclic Redundancy Check}
checksum of \var{string}. If
\var{value} is present, it is used as the starting value of the
checksum; otherwise, a fixed default value is used. This allows