chore(util/lp/lp_primal_core_solver): fix warning
chore(util/lp/lp_primal_core_solver): fix warning

leanprover/lean,dselsam/lean,Kha/lean,levnach/lean,javra/lean,fgdorais/lean,javra/lean,leodemoura/lean,leanprover-community/lean,fpvandoorn/lean2,dselsam/lean,fpvandoorn/lean,digama0/lean,leanprover-community/lean,fgdorais/lean,leodemoura/lean,rlewis1988/lean,leodemoura/lean,dselsam/lean,soonhokong/lean-osx,fgdorais/lean,leanprover-community/lean,soonhokong/lean,johoelzl/lean,soonhokong/lean-osx,soonhokong/lean-windows,digama0/lean,leanprover-community/lean,rlewis1988/lean,rlewis1988/lean,fpvandoorn/lean2,leanprover-community/lean,Kha/lean,soonhokong/lean,UlrikBuchholtz/lean,UlrikBuchholtz/lean,fpvandoorn/lean2,soonhokong/lean,leodemoura/lean,leodemoura/lean,avigad/lean,leodemoura/lean,dselsam/lean,leanprover/lean,soonhokong/lean-osx,javra/lean,johoelzl/lean,UlrikBuchholtz/lean,digama0/lean,UlrikBuchholtz/lean,digama0/lean,fgdorais/lean,avigad/lean,fpvandoorn/lean,Kha/lean,leanprover-community/lean,avigad/lean,leanprover/lean,fgdorais/lean,dselsam/lean,avigad/lean,fpvandoorn/lean2,digama0/lean,levnach/lean,Kha/lean,fpvandoorn/lean,soonhokong/lean,soonhokong/lean-windows,Kha/lean,levnach/lean,soonhokong/lean-windows,levnach/lean,dselsam/lean,johoelzl/lean,fpvandoorn/lean2,Kha/lean,fpvandoorn/lean,soonhokong/lean-windows,leanprover/lean,rlewis1988/lean,avigad/lean,avigad/lean,johoelzl/lean,leanprover/lean,rlewis1988/lean,javra/lean,soonhokong/lean,fpvandoorn/lean,fpvandoorn/lean,javra/lean,fgdorais/lean,soonhokong/lean-windows,johoelzl/lean,johoelzl/lean,UlrikBuchholtz/lean,digama0/lean,soonhokong/lean-osx,rlewis1988/lean,levnach/lean,soonhokong/lean-osx,leanprover/lean