fixed error propagaytion

lib/holidays.js

@@ -171,6 +171,12 @@ function Holidays(year) {
   };
 
   this.getHoliday = function (id) {
+    if(id == 0) {
+      var ret = [];
+      for(var key in holidays)
+        ret.push(holidays[key]);
+      return ret;
+    }
     if (id in holidays)
       return [holidays[id]];
     console.error("invalid holiday id " + id);

todo

@@ -43,3 +43,5 @@ openingHoursView(json, now, regionalCode, lang)
   -->html string
 
 openNow auch nach absprache, nur mit json incl
+
+evtl ical export
\ No newline at end of file