Fix uninitialized variables bug
Fix uninitialized variables bug

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

javra/lean,c-cube/lean,johoelzl/lean,Kha/lean,fpvandoorn/lean,htzh/lean,fgdorais/lean,c-cube/lean,soonhokong/lean-osx,avigad/lean,soonhokong/lean,dselsam/lean,eigengrau/lean,soonhokong/lean-osx,leodemoura/lean,levnach/lean,leodemoura/lean,johoelzl/lean,levnach/lean,fgdorais/lean,rlewis1988/lean,soonhokong/lean,Kha/lean,UlrikBuchholtz/lean,digama0/lean,fpvandoorn/lean2,Kha/lean,leodemoura/lean,avigad/lean,fpvandoorn/lean,leanprover-community/lean,soonhokong/lean-windows,htzh/lean,digama0/lean,soonhokong/lean-osx,fpvandoorn/lean2,fgdorais/lean,leanprover/lean,rlewis1988/lean,dselsam/lean,dselsam/lean,sp3ctum/lean,digama0/lean,javra/lean,fgdorais/lean,codyroux/lean0.1,fpvandoorn/lean2,levnach/lean,leanprover-community/lean,leodemoura/lean,rlewis1988/lean,fpvandoorn/lean2,johoelzl/lean,soonhokong/lean-osx,htzh/lean,fgdorais/lean,leanprover/lean,sp3ctum/lean,eigengrau/lean,leanprover/lean,UlrikBuchholtz/lean,soonhokong/travis_test,fpvandoorn/lean,javra/lean,avigad/lean,leanprover/lean,soonhokong/lean-windows,soonhokong/travis_test,Kha/lean,fpvandoorn/lean2,leanprover/lean,eigengrau/lean,htzh/lean,codyroux/lean0.1,leodemoura/lean,digama0/lean,fpvandoorn/lean,rlewis1988/lean,dselsam/lean,levnach/lean,javra/lean,c-cube/lean,rlewis1988/lean,digama0/lean,dselsam/lean,codyroux/lean0.1,avigad/lean,soonhokong/travis_test,fpvandoorn/lean,sp3ctum/lean,leanprover/lean,soonhokong/lean-windows,Kha/lean,leanprover-community/lean,c-cube/lean,johoelzl/lean,sp3ctum/lean,leanprover-community/lean,soonhokong/lean,eigengrau/lean,Kha/lean,digama0/lean,rlewis1988/lean,soonhokong/lean-osx,johoelzl/lean,soonhokong/lean,soonhokong/travis_test,htzh/lean,avigad/lean,johoelzl/lean,eigengrau/lean,sp3ctum/lean,leanprover-community/lean,fpvandoorn/lean,leodemoura/lean,avigad/lean,UlrikBuchholtz/lean,c-cube/lean,codyroux/lean0.1,leanprover-community/lean,dselsam/lean,soonhokong/lean-windows,soonhokong/lean,UlrikBuchholtz/lean,levnach/lean,soonhokong/lean-windows,fgdorais/lean,javra/lean,UlrikBuchholtz/lean