settings reader fix

src/files/settings_io.cpp

@@ -113,6 +113,10 @@ Setting* SettingsHandler::getSetting(const std::string& name) const {
     return found->second;
 }
 
+bool SettingsHandler::has(const std::string& name) const {
+    return map.find(name) != map.end();
+}
+
 template<class T>
 static void set_numeric_value(T* setting, const dynamic::Value& value) {
     switch (value.type) {

src/files/settings_io.hpp

@@ -26,6 +26,7 @@ public:
     void setValue(const std::string& name, const dynamic::Value& value);
     std::string toString(const std::string& name) const;
     Setting* getSetting(const std::string& name) const;
+    bool has(const std::string& name) const;
 
     std::vector<Section>& getSections();
 };