Update presolve.jl

cc @frapac

Author: amontoison

src/presolve/presolve.jl

@@ -203,11 +203,13 @@ function presolve(
 ) where {T <: Real, S, M1 <: SparseMatrixCOO, M2 <: SparseMatrixCOO}
   start_time = time()
   psqm = copy_qm(qm)
-  psdata = psqm.data
   c = psdata.c
   lvar, uvar = psqm.meta.lvar, psqm.meta.uvar
   lcon, ucon = psqm.meta.lcon, psqm.meta.ucon
   nvar, ncon = psqm.meta.nvar, psqm.meta.ncon
+  psdata = psqm.data
+  resize!(psdata.v, nvar)
+
   # copy if same vector
   lcon === ucon && (lcon = copy(lcon))
   lvar === uvar && (lvar = copy(lvar))