From 6a7ef9cccd26481afa1e5ea4e03806669dec9541 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Sat, 29 Jun 2019 20:47:50 -0400
Subject: convert(): Fix undefined $output in eq

---
diff --git a/bin/bdf2fbcon b/bin/bdf2fbcon
index 7f50dcf..5c7a9c4 100755
--- a/bin/bdf2fbcon
+++ b/bin/bdf2fbcon
@@ -263,7 +263,7 @@ sub convert
 	my $line;
 	my $font;
 
-	if ($input eq $output and $input ne '-') {
+	if ($input eq ($output or '') and $input ne '-') {
 		warning('Input and output files are equal');
 	}
 
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