Function: Vecrev
Section: conversions
C-Name: gtovecrev
Prototype: DG
Help: Vecrev({x=[]}): transforms the object x into a vector.
 Empty vector if x is omitted.
Description:
 ():vec        cgetg(1,t_VEC)
 (gen):vec     gtovecrev($1)
Doc:
 as $\kbd{Vec}(x)$, then reverse the result. In particular
 In this case, \kbd{Vecrev} is the reciprocal function of \kbd{Polrev}: the
 coefficients of the vector start with the constant coefficient of the
 polynomial and the others follow by increasing degree.
