gemv BUG

public static FloatMatrix gemv(float alpha, FloatMatrix a, FloatMatrix x, float beta, FloatMatrix y)  or DoubleMatrix 's implementation has two errors:
1. when beta!=0, original implementation will have java.lang.ArrayIndexOutOfBoundsException: " j < a.columns;"
2. forget multiple alpha when do "y.data[i] += a.get(i, j) * xj;"