* zero command data buffer

main.c

@@ -103,6 +103,7 @@ int main(int argc, char *argv[])
 
         uint8_t buffer[64];
         memset(buffer, 0, sizeof(buffer));
+        memset(command_data, 0, sizeof(command_data));
 
         if (argc == 2 && argv[1][0] == '.') {
                 command = 0x08;