Backport from upstream "fix potential double free error"
https://sourceforge.net/p/anyremote/code/1086/
--- a/src/dispatcher.c
+++ b/src/dispatcher.c
@@ -2,7 +2,7 @@
 // anyRemote
 // a wi-fi or bluetooth remote for your PC.
 //
-// Copyright (C) 2006-2016 Mikhail Fedotov <anyremote@mail.ru>
+// Copyright (C) 2006-2020 Mikhail Fedotov <anyremote@mail.ru>
 //
 // This program is free software; you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
@@ -216,7 +216,7 @@
         if (dm->value != NULL) {
             free(dm->value);
         }
-        if (dm->file != NULL) {
+        if (dm->file != NULL && dm->file != dm->scaled) {
             free(dm->file);
         }
         if (dm->scaled != NULL) {