[gtk-doc] mkdb: fix perl warning

[Stefan Kost <stefkost src gnome org>]

commit d5fa5aff3bf6c705ee701bdd57ac0c15fe6e21d0
Author: Stefan Sauer <ensonic users sf net>
Date:   Wed Feb 10 22:18:55 2016 +0100

    mkdb: fix perl warning

 gtkdoc-mkdb.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtkdoc-mkdb.in b/gtkdoc-mkdb.in
index b2cd60f..8dd6d5e 100755
--- a/gtkdoc-mkdb.in
+++ b/gtkdoc-mkdb.in
@@ -2008,8 +2008,8 @@ sub OutputEnum {
     my %field_descrs = (defined $params ? @$params : ());
     my $missing_parameters = "";
     my $unused_parameters = "";
-    my $id = &CreateValidSGMLID ("$symbol".".members");
 
+    $id = &CreateValidSGMLID ("$symbol".".members");
     $desc .= <<EOF;
 <refsect3 id="$id" role="enum_members">\n<title>Members</title>
 <informaltable role="enum_members_table" pgwide="1" frame="none">