Merge "Asserting flashing plan is used in do_flash" into main

void do_flash(const char* pname, const char* fname, const bool apply_vbmeta,

              const FlashingPlan* fp) {

    if (!fp) {

        die("do flash was called without a valid flashing plan");

    }

    verbose("Do flash %s %s", pname, fname);

    struct fastboot_buffer buf;

    if (fp && fp->source) {

    if (fp->source) {

        unique_fd fd = fp->source->OpenFile(fname);

        if (fd < 0 || !load_buf_fd(std::move(fd), &buf, fp)) {

            die("could not load '%s': %s", fname, strerror(errno));