convert option to number if not '*'

Author: lukeapage

lib/parse-options.js

@@ -17,7 +17,11 @@ module.exports = function(options) {
                     options.keepSpecialComments = 1;
                     break;
                 case "keepSpecialComments":
-                    options.keepSpecialComments = argSplit[1];
+                    var specialCommentOption = argSplit[1];
+                    if (specialCommentOption !== "*") {
+                        specialCommentOption = Number(specialCommentOption);
+                    }
+                    options.keepSpecialComments = specialCommentOption;
                     break;
                 // for compatibility - does nothing
                 case "skip-advanced":