dfu_load: Return success if device is gone after manifest-wait-reset

Even if this condition was specifically meant to be ignored, the
libusb error was propagating back to main and used as exit code.

(Not that any DFU-compliant device should report being in the
dfuMANIFEST-WAIT-RESET state though.)

Thanks to Andreas Rosvall for initial patch.

https://sourceforge.net/p/dfu-util/tickets/169/

Signed-off-by: Tormod Volden <[email protected]>

src/dfu_load.c

@@ -206,6 +206,8 @@ int dfuload_do_dnload(struct dfu_if *dif, int xfer_size, struct dfu_file *file)
 		if (ret < 0 && ret != LIBUSB_ERROR_NOT_FOUND) {
 			fprintf(stderr, "error resetting after download (%s)\n",
 				libusb_error_name(ret));
+		} else {
+			ret = 0;
 		}
 		break;
 	case DFU_STATE_dfuIDLE: