spacing of bar before a clivis

[eroux]

Using the same TeX code as #1139 with the gabc file

name:Iesum qui crucifixus;
%%
(c4) Ie(g)sum,(g_) *() qui(g) cru(g)ci(g)(gf__)xus(g) est(h) qu{<sp>'ae</sp>}(j)ri(j)tis,(ig__) (,) al(i_0j>_0)le(hg)lú(hg>)ia:(f.) (;) non(gf) est(g_h) hic,(jv_jv_) sur(j)ré(k)xit(i) e(j)nim,(hg__) (,) sic(gf)ut(d) di(e)xit(f<) vo(g)bis,(f) al(gh)le(h)lú(g.)ia.(g.) (::) <eu>E(j) u(j) o(i) u(j) a(h) e</eu>(g) (::)

one obtains a result with the following oddity:

where the bar is not centered. This behavior can apparently be reproduced with all clivis using the special clivis alignment