Extracting a color column vector from a color matrix

Syntax	void QLA_V_eqop_colorvec_T( restrict QLA_ColorVector *r,
	Type *a, int j)
Meaning	$r_i = a_{i,j}\ \ \ \mbox{for $i = 0\ldots{}n_c-1$}$
T	M
eqop	eq