function minViewBufferIndex( N, stride, offset ) {
	if ( N > 0 && stride < 0 ) {
		offset += (N-1) * stride; // decrements the offset
	}
	return offset;
}
Returns the minimum accessible index based on a set of provided strided array parameters.

@param {NonNegativeInteger} N - number of indexed elements
@param {integer} stride - stride length
@param {NonNegativeInteger} offset - starting index
@returns {NonNegativeInteger} index

@example
var idx = minViewBufferIndex( 3, -2, 10 );
// returns 6