fixup! Contract type comparison deprecation warning

Author: matheusaaguiar

libsolidity/analysis/TypeChecker.cpp

@@ -1837,7 +1837,8 @@ void TypeChecker::endVisit(BinaryOperation const& _operation)
 			9170_error,
 			_operation.location(),
 			"Comparison of variables of contract type is deprecated and scheduled for removal "
-			"in the next breaking version (0.9). Instead, use an explicit cast to address type."
+			"in the next breaking version (0.9). "
+			"Use an explicit cast to address type and compare the addresses instead."
 		);
 }