SDL: wikiheaders.pl: Fixed uninitialized value warning when run without arguments.

SDL Commits
1 
From 1b81ececd372dd2f4b6ad4df45961a1f18315b75 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Tue, 21 Mar 2023 21:56:34 -0700
Subject: [PATCH] wikiheaders.pl: Fixed uninitialized value warning when run
 without arguments.

---
 build-scripts/wikiheaders.pl | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/build-scripts/wikiheaders.pl b/build-scripts/wikiheaders.pl
index 4633ef1d6a97..1049e145e754 100755
--- a/build-scripts/wikiheaders.pl
+++ b/build-scripts/wikiheaders.pl
@@ -59,10 +59,6 @@
     $optionsfname = $default_optionsfname;
 }
 
-if (not defined $manpath) {
-    $manpath = "$srcpath/man";
-}
-
 if (defined $optionsfname) {
     open OPTIONS, '<', $optionsfname or die("Failed to open options file '$optionsfname': $!\n");
     while (<OPTIONS>) {
@@ -490,6 +486,10 @@ sub usage {
 usage() if not defined $wikipath;
 #usage() if $copy_direction == 0;
 
+if (not defined $manpath) {
+    $manpath = "$srcpath/man";
+}
+
 my @standard_wiki_sections = (
     'Draft',
     '[Brief]',