Made argument for '--progress' optional

src/storm/settings/modules/GeneralSettings.cpp

@@ -38,7 +38,7 @@ namespace storm {
                                 .addArgument(storm::settings::ArgumentBuilder::createStringArgument("filter", "'frequent' for frequently used options, 'all' for the complete help, or a regular expression to show help for all matching entities.").setDefaultValueString("frequent").makeOptional().build()).build());
                 this->addOption(storm::settings::OptionBuilder(moduleName, versionOptionName, false, "Prints the version information.").build());
                 this->addOption(storm::settings::OptionBuilder(moduleName, verboseOptionName, false, "Enables more verbose output.").setShortName(verboseOptionShortName).build());
-                this->addOption(storm::settings::OptionBuilder(moduleName, showProgressOptionName, false, "Sets when additional information (if available) about the progress is printed.").addArgument(storm::settings::ArgumentBuilder::createUnsignedIntegerArgument("delay", "The delay to wait (in seconds) between emitting information (0 means never print progress).").setDefaultValueUnsignedInteger(5).build()).build());
+                this->addOption(storm::settings::OptionBuilder(moduleName, showProgressOptionName, false, "Sets when additional information (if available) about the progress is printed.").addArgument(storm::settings::ArgumentBuilder::createUnsignedIntegerArgument("delay", "The delay to wait (in seconds) between emitting information (0 means never print progress).").setDefaultValueUnsignedInteger(5).makeOptional().build()).build());
                 this->addOption(storm::settings::OptionBuilder(moduleName, precisionOptionName, false, "The internally used precision.").setShortName(precisionOptionShortName)
                                 .addArgument(storm::settings::ArgumentBuilder::createDoubleArgument("value", "The precision to use.").setDefaultValueDouble(1e-06).addValidatorDouble(ArgumentValidatorFactory::createDoubleRangeValidatorExcluding(0.0, 1.0)).build()).build());
                 this->addOption(storm::settings::OptionBuilder(moduleName, configOptionName, false, "If given, this file will be read and parsed for additional configuration settings.").setShortName(configOptionShortName)