add missing <limits>

artemp · artemp · commit c839c666c324 · 2017-02-06T10:57:32.000+01:00
diff --git a/include/mapbox/variant.hpp b/include/mapbox/variant.hpp
@@ -11,6 +11,7 @@
 #include <typeinfo>
 #include <utility>
 #include <functional>
+#include <limits>
 
 #include <mapbox/recursive_wrapper.hpp>
 #include <mapbox/variant_visitor.hpp>
