Random: Mark getRandom* const

random.h

@@ -22,8 +22,8 @@ class Random
 {
   public:
 	Random();
-	std::string getRandomHexString(unsigned int bytes);
-	std::vector<char> getRandom(unsigned int bytes);
+	std::string getRandomHexString(unsigned int bytes) const;
+	std::vector<char> getRandom(unsigned int bytes) const;
 };
 
 #endif // RANDOM_H