Fix HYPRE solution building

I can't seem to install HYPRE locally, but this should be what the issue is.

Author: ChrisRackauckas

ext/LinearSolveHYPRE.jl

@@ -198,7 +198,7 @@ function SciMLBase.solve(cache::LinearCache, alg::HYPREAlgorithm, args...; kwarg
     T = cache.u isa HYPREVector ? HYPRE_Complex : eltype(cache.u) # eltype(u)
     N = 1 # length((size(u)...,))
     resid = HYPRE.GetFinalRelativeResidualNorm(hcache.solver)
-    iters = HYPRE.GetNumIterations(hcache.solver)
+    iters = Int(HYPRE.GetNumIterations(hcache.solver))
     retc = SciMLBase.ReturnCode.Default # TODO: Fetch from solver
 
     ret = SciMLBase.LinearSolution{T, N, typeof(cache.u), typeof(resid), typeof(alg),