Serial mouse: do not attempt to transmit a byte if none is queued, fixes #5475.
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@@ -146,7 +146,11 @@ sermouse_transmit_byte(mouse_t *dev, int do_next)
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serial_write_fifo(dev->serial, dev->buf[dev->buf_pos]);
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if (do_next) {
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dev->buf_pos = (dev->buf_pos + 1) % dev->buf_len;
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/* If we have a buffer length of 0, pretend the state is STATE_SKIP_PACKET. */
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if (dev->buf_len == 0)
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dev->buf_pos = 0;
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else
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dev->buf_pos = (dev->buf_pos + 1) % dev->buf_len;
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if (dev->buf_pos != 0)
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sermouse_set_period(dev, dev->transmit_period);
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@@ -374,6 +378,7 @@ sermouse_report(mouse_t *dev)
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break;
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default:
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pclog("unknown dev->format = %02X\n", dev->format);
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break;
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}
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@@ -747,7 +752,7 @@ sermouse_timer(void *priv)
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if (!dev->prompt && !dev->continuous)
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sermouse_transmit_report(dev, (dev->state == STATE_TRANSMIT_REPORT));
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else
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dev->state = STATE_IDLE;
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dev->state = STATE_IDLE;
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break;
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case STATE_TRANSMIT_REPORT:
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case STATE_TRANSMIT:
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