Fix SocketClient checking for more data, now that we buffer received data

app/Classes/Sock/SocketClient.php

@@ -502,7 +502,7 @@ final class SocketClient {
 	}
 
 	/**
-	 * See if we there is data waiting to collect, or if we can send
+	 * See if there is data waiting to collect, or if we can send
 	 *
 	 * @param bool $read
 	 * @param bool $write
@@ -512,6 +512,9 @@ final class SocketClient {
 	 */
 	public function ttySelect(bool $read,bool $write, int $timeout): int
 	{
+		if (strlen($this->rx_buf) && ($this->rx_left))
+			return 1;
+
 		$read = $read ? [$this->connection] : NULL;
 		$write = $write ? [$this->connection] : NULL;