Fix compilation in Visual C++ 2013.
I had to fix the following things to make Ceres compile in 2013:
* Not link to 'm' (GNU math library).
* Excplicitly convert an std::ostream to bool.
* Include <algorithm> for std::max.
Change-Id: I3ff65413baf8711364360d46dd71fd553fa63e72
diff --git a/internal/ceres/test_util.cc b/internal/ceres/test_util.cc
index a3f67bd..8af48ab 100644
--- a/internal/ceres/test_util.cc
+++ b/internal/ceres/test_util.cc
@@ -30,6 +30,7 @@
//
// Utility functions useful for testing.
+#include <algorithm>
#include <cmath>
#include "ceres/file.h"
#include "ceres/stringprintf.h"
