Build fixes

Conflicts:
	src/server/game/Handlers/ItemHandler.cpp

src/common/Logging/Appender.h

@@ -126,9 +126,7 @@ Appender* CreateAppender(uint8 id, std::string const& name, LogLevel level, Appe
 class InvalidAppenderArgsException : public std::length_error
 {
 public:
-    using std::length_error::length_error;
-
-    explicit InvalidAppenderArgsException(std::string const& message) : length_error(message) { }
+    explicit InvalidAppenderArgsException(std::string const& message) : std::length_error(message) { }
 };
 
 #endif