Positional notation (piece@square) broken

[jniemann66]

In the absence of fen and pgn props, chessdiagram should simply draw a blank board, or otherwise accept an array of piece@square values via the pieces prop.

However, internal movelist is being populated in the constructor (via the getFensFromPgn() function).

proposed fix (chessdiagram.js, starting line 38):

	        // If FEN is present, and it is an array, use it for moves
		// If FEN is present, and it is a string, make it the first element of the moves array.
		// If FEN is NOT present, and PGN is present, call getFensFromPgn() to generate an array of FENs 
		// If FEN is NOT present, and PGN is NOT present, make first element of moves array an empty string
		const moves = props.fen ?
			Array.isArray(props.fen) ? props.fen : [props.fen]
			: props.pgn ? props.getFensFromPgn(props.pgn) : '';

		// If there is a PGN, set currentMove to this.startMove, otherwise zero.	
		const currentMove = props.pgn ? this.startMove : 0;

[jniemann66]

fixed in 19eadb5