Fix a set of compilation warnings

Author: Felipe Zimmerle

CHANGES

@@ -1,6 +1,8 @@
 v3.0.x - YYYY-MMM-DD (To be released)
 -------------------------------------
 
+ - Fix a set of compilation warnings
+   [Issue #1650 - @zimmerle, @JayCase]
  - Check for disruptive action on SecDefaultAction.
    [Issue #1614 - @zimmerle, @michaelgranzow-avi]
  - Fix block-block infinite loop.

headers/modsecurity/rule.h

@@ -50,7 +50,7 @@ class Rule {
             std::string fileName,
             int lineNumber);
     explicit Rule(std::string marker);
-    ~Rule();
+    virtual ~Rule();
 
     virtual bool evaluate(Transaction *transaction,
         std::shared_ptr<RuleMessage> rm);

src/operators/rx.h

@@ -60,7 +60,7 @@ class Rx : public Operator {
         const std::string& input,
         std::shared_ptr<RuleMessage> ruleMessage) override;
 
-    bool init(const std::string &arg, std::string *error);
+    bool init(const std::string &arg, std::string *error) override;
 
  private:
     Regex *m_re;