maninst: Fix stupid variable-name typo.

Introduced in de8440c...  Not my finest hour, really.

diff --git a/maninst b/maninst
index 25ea78d..20fbf6c 100755 (executable)
--- a/maninst
+++ b/maninst
@@ -24,7 +24,7 @@ case $op in
   *) echo >&2 "$0: unknown operation \`$1'"; exit 1 ;;
 esac
 for i; do
-  base=${i##*/} src=${base##*.}
+  base=${i##*/} sec=${base##*.}
   case $op in
     install)
       echo -n " Installing manpage $base$ext"