Use attributes where possible

src/RageException.h

@@ -9,7 +9,9 @@
  * The original documentation stated this was a class for some reason. */
 namespace RageException
 {
-	void SM_NORETURN Throw( const char *fmt, ... ) PRINTF(1,2);
+	[[noreturn]]
+	void Throw( const char *fmt, ... ) PRINTF(1,2);
+
 	void SetCleanupHandler( void (*pHandler)(const RString &sError) );
 }