Index: firmware/common/unicode.c
===================================================================
--- firmware/common/unicode.c	(revision 18978)
+++ firmware/common/unicode.c	(arbetskopia)
@@ -140,7 +140,10 @@
 
     if (!load_cp_table(cp)) cp = 0;
 
-    while (count--) {
+    *utf8 = 0;
+
+    while (0 < count--)
+    {
         if (*iso < 128 || cp == UTF_8) /* Already UTF-8 */
             *utf8++ = *iso++;