QueryStream into_result doesn't return correct number of results

[ZemanOndrej]

this ruins queries with multiple select statements because if one select returns nothing you cant know which select it was

tiberius/src/tds/stream/query.rs

Lines 223 to 248 in 406ad27

	pub async fn into_results(mut self) -> crate::Result<Vec<Vec<Row>>> {
	let mut results: Vec<Vec<Row>> = Vec::new();
	let mut result: Option<Vec<Row>> = None;
	while let Some(item) = self.try_next().await? {
	match (item, &mut result) {
	(QueryItem::Row(row), None) => {
	result = Some(vec![row]);
	}
	(QueryItem::Row(row), Some(ref mut result)) => result.push(row),
	(QueryItem::Metadata(_), None) => {
	result = Some(Vec::new());
	}
	(QueryItem::Metadata(_), ref mut previous_result) => {
	results.push(previous_result.take().unwrap());
	result = None;
	}
	}
	}
	if let Some(result) = result {
	results.push(result);
	}
	Ok(results)
	}