Add const: setValue(const char *)

Author: ralfluebben

Diff for: RadiusClass/RadiusVendorSpecificAttribute.h

@@ -59,7 +59,7 @@ class RadiusVendorSpecificAttribute
 	void			setType(Octet);
 
 	Octet *			getValue(void);
-	int			    setValue(char *);
+	int			    setValue(const char *);
 	int			    setValue(int);