added a few comments

apps/opencs/model/prefs/doublesetting.hpp

@@ -19,6 +19,7 @@ namespace CSMPrefs
             DoubleSetting (Category *parent, Settings::Manager *values,
                 const std::string& key, const std::string& label, double default_);
 
+            // defaults to [0, std::numeric_limits<double>::max()]
             DoubleSetting& setRange (double min, double max);
 
             DoubleSetting& setMin (double min);

apps/opencs/model/prefs/intsetting.hpp

@@ -19,6 +19,7 @@ namespace CSMPrefs
             IntSetting (Category *parent, Settings::Manager *values,
                 const std::string& key, const std::string& label, int default_);
 
+            // defaults to [0, std::numeric_limits<int>::max()]
             IntSetting& setRange (int min, int max);
 
             IntSetting& setMin (int min);