Parallelizer: qualify std::min<int>() to avoid test/main.h macro collision

libeigen/eigen!2483

Co-authored-by: Rasmus Munk Larsen <rmlarsen@gmail.com>

Eigen/src/Core/products/Parallelizer.h

diff --git a/Eigen/src/Core/products/Parallelizer.h b/Eigen/src/Core/products/Parallelizer.h
index f4625e2..96cc237 100644
--- a/Eigen/src/Core/products/Parallelizer.h
+++ b/Eigen/src/Core/products/Parallelizer.h
@@ -141,7 +141,7 @@
     // for OpenMP.
     eigen_internal_assert(*v >= 0);
     int omp_threads = omp_get_max_threads();
-    m_maxThreads = (*v == 0 ? omp_threads : std::min(*v, omp_threads));
+    m_maxThreads = (*v == 0 ? omp_threads : std::min<int>(*v, omp_threads));
 #elif defined(EIGEN_GEMM_THREADPOOL)
     // Calling action == SetAction and *v = 0 means
     // restoring m_maxThreads to the number of threads in the ThreadPool,