fix(library/module): bug in module import
fix(library/module): bug in module import

Signed-off-by: Leonardo de Moura <7610bae85f2b530654cc716772f1fe653373e892@microsoft.com>

c-cube/lean,Kha/lean,johoelzl/lean,fpvandoorn/lean2,digama0/lean,soonhokong/lean-osx,soonhokong/lean-windows,fpvandoorn/lean,UlrikBuchholtz/lean,soonhokong/lean,eigengrau/lean,leodemoura/lean,sp3ctum/lean,levnach/lean,avigad/lean,fgdorais/lean,leodemoura/lean,soonhokong/travis_test,eigengrau/lean,leodemoura/lean,leanprover/lean,leanprover-community/lean,fgdorais/lean,dselsam/lean,Kha/lean,johoelzl/lean,leanprover-community/lean,htzh/lean,htzh/lean,eigengrau/lean,avigad/lean,fpvandoorn/lean,soonhokong/lean-osx,sp3ctum/lean,leanprover/lean,sp3ctum/lean,rlewis1988/lean,levnach/lean,soonhokong/lean-osx,johoelzl/lean,rlewis1988/lean,soonhokong/lean,soonhokong/travis_test,leodemoura/lean,javra/lean,soonhokong/lean-osx,fgdorais/lean,digama0/lean,UlrikBuchholtz/lean,levnach/lean,dselsam/lean,htzh/lean,fpvandoorn/lean,fpvandoorn/lean2,sp3ctum/lean,leanprover-community/lean,c-cube/lean,soonhokong/lean,digama0/lean,digama0/lean,fgdorais/lean,javra/lean,leodemoura/lean,soonhokong/lean-windows,dselsam/lean,dselsam/lean,digama0/lean,soonhokong/travis_test,avigad/lean,fpvandoorn/lean2,dselsam/lean,soonhokong/lean,soonhokong/lean-windows,leodemoura/lean,johoelzl/lean,johoelzl/lean,leanprover-community/lean,soonhokong/lean-windows,leanprover/lean,htzh/lean,javra/lean,avigad/lean,fpvandoorn/lean2,UlrikBuchholtz/lean,fgdorais/lean,avigad/lean,soonhokong/travis_test,leanprover/lean,sp3ctum/lean,leanprover-community/lean,leanprover/lean,leanprover/lean,UlrikBuchholtz/lean,leanprover-community/lean,levnach/lean,c-cube/lean,Kha/lean,rlewis1988/lean,dselsam/lean,fpvandoorn/lean,Kha/lean,fgdorais/lean,fpvandoorn/lean2,UlrikBuchholtz/lean,Kha/lean,fpvandoorn/lean,soonhokong/lean,fpvandoorn/lean,c-cube/lean,rlewis1988/lean,rlewis1988/lean,soonhokong/lean-osx,digama0/lean,eigengrau/lean,c-cube/lean,johoelzl/lean,rlewis1988/lean,levnach/lean,soonhokong/lean-windows,eigengrau/lean,Kha/lean,avigad/lean,javra/lean,htzh/lean,javra/lean