Add limits header to ensure gcc11 compatibility

TobiKattmann · TobiKattmann · commit 130e2dd868ad · 2022-01-07T09:40:33.000+01:00
Since gcc11 some headers (including limts) are used much less in the standard library headers. See https://stackoverflow.com/questions/4798936/numeric-limits-was-not-declared-in-this-scope-no-matching-function-for-call-t
diff --git a/SU2_CFD/include/variables/CEulerVariable.hpp b/SU2_CFD/include/variables/CEulerVariable.hpp
@@ -27,6 +27,7 @@
 
 #pragma once
 
+#include <limits>
 #include "CFlowVariable.hpp"
 
 /*!
diff --git a/SU2_CFD/include/variables/CIncEulerVariable.hpp b/SU2_CFD/include/variables/CIncEulerVariable.hpp
@@ -27,6 +27,7 @@
 
 #pragma once
 
+#include <limits>
 #include "CFlowVariable.hpp"
 
 /*!
