fsize can't be zero

client/cmdhfmfu.c

@@ -2076,7 +2076,7 @@ int CmdHF14AMfURestore(const char *Cmd) {
     fseek(f, 0, SEEK_END);
     long fsize = ftell(f);
     fseek(f, 0, SEEK_SET);
-    if (fsize < 0) {
+    if (fsize <= 0) {
         PrintAndLogEx(WARNING, "Error, when getting filesize");
         fclose(f);
         return 1;