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ref: 795ccf60023fd76893345c8ef6cefd535004a240
parent: 4e09175fdaaffc0483fc9bf767311268794d956c
author: Ben Harris <bjh21@bjh21.me.uk>
date: Mon Feb 20 09:54:17 EST 2023

GTK: Free error message if new_window fails

This is kind of pointless because it comes just before a return from
main(), but it's pretty harmless and it cheers up AddressSanitizer.

--- a/gtk.c
+++ b/gtk.c
@@ -4115,6 +4115,7 @@
 
 	if (!fe) {
 	    fprintf(stderr, "%s: %s\n", pname, error);
+            sfree(error);
 	    return 1;
 	}