Addressed some static analysis warnings

Based on findings in #957

include/internal/catch_evaluate.hpp

@@ -37,7 +37,7 @@ namespace Internal {
     template<> struct OperatorTraits<IsGreaterThanOrEqualTo>{ static const char* getName(){ return ">="; } };
 
     template<typename T>
-    inline T& opCast(T const& t) { return const_cast<T&>(t); }
+    T& opCast(T const& t) { return const_cast<T&>(t); }
 
 // nullptr_t support based on pull request #154 from Konstantin Baumann
 #ifdef CATCH_CONFIG_CPP11_NULLPTR
@@ -48,7 +48,7 @@ namespace Internal {
     // So the compare overloads can be operator agnostic we convey the operator as a template
     // enum, which is used to specialise an Evaluator for doing the comparison.
     template<typename T1, typename T2, Operator Op>
-    class Evaluator{};
+    struct Evaluator{};
 
     template<typename T1, typename T2>
     struct Evaluator<T1, T2, IsEqualTo> {