Fix compilation on VS2010 (#207)

Author: SergiusTheBest

include/plog/Record.h

@@ -97,7 +97,13 @@ namespace plog
 
         // Print std containers
         template<class Container>
-        inline typename meta::enableIf<!!(sizeof(typename Container::const_iterator)), void>::type operator<<(util::nostringstream& stream, const Container& data)
+        inline typename meta::enableIf<!!(sizeof(
+#if defined(_MSC_VER) && _MSC_VER < 1700 // MSVC 2010 doesn't understand `typename Container::const_iterator`
+            meta::declval<Container>().begin()) + sizeof(meta::declval<Container>().end()
+#else
+            typename Container::const_iterator
+#endif
+            )), void>::type operator<<(util::nostringstream& stream, const Container& data)
         {
             stream << "[";