Improves address literal checksum error message

libsolidity/ast/AST.cpp

@@ -583,3 +583,9 @@ bool Literal::passesAddressChecksum() const
 	solAssert(isHexNumber(), "Expected hex number");
 	return dev::passesAddressChecksum(value(), true);
 }
+
+std::string Literal::getChecksummedAddress() const
+{
+	solAssert(isHexNumber(), "Expected hex number");
+	return dev::getChecksummedAddress(value());
+}

libsolidity/ast/AST.h

@@ -1613,6 +1613,8 @@ public:
 	bool looksLikeAddress() const;
 	/// @returns true if it passes the address checksum test.
 	bool passesAddressChecksum() const;
+	/// @returns the checksummed version of an address
+	std::string getChecksummedAddress() const;
 
 private:
 	Token::Value m_token;