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freetdm: do not write to io dump if is not enabled
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@ -91,6 +91,10 @@ static void write_chan_io_dump(ftdm_channel_t *fchan, ftdm_io_dump_t *dump, char
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int windex = dump->windex;
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int avail = dump->size - windex;
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if (!dump->buffer) {
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return;
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}
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if (dlen > avail) {
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int diff = dlen - avail;
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