[Common] Add missing #include <sstream>

f00a4fe2 · Florian Schmaus · 8f38dbed · f00a4fe2
Commit f00a4fe2 authored 4 years ago by Florian Schmaus
--- a/emper/Common.hpp
+++ b/emper/Common.hpp
@@ -3,6 +3,7 @@
 #pragma once

 #include <functional>
+#include <sstream>	// IWYU pragma: keep

 using func_t = std::function<void()>;