workaround for error with Thai calendar settings (https://bugzilla.xamarin.com/show_bug.cgi?id=59077), fixes #327

src/keepass2android/app/App.cs

@@ -860,8 +860,20 @@ namespace keepass2android
 
         public static readonly Kp2aApp Kp2a = new Kp2aApp();
 
-		public override void OnCreate() {
-			base.OnCreate();
+	    private static void InitThaiCalendarCrashFix()
+	    {
+	        var localeIdentifier = Java.Util.Locale.Default.ToString();
+	        if (localeIdentifier == "th_TH")
+	        {
+	            new System.Globalization.ThaiBuddhistCalendar();
+	        }
+	    }
+
+        public override void OnCreate()
+        {
+            InitThaiCalendarCrashFix();
+
+            base.OnCreate();
 
 			Kp2aLog.Log("Creating application "+PackageName+". Version=" + PackageManager.GetPackageInfo(PackageName, 0).VersionCode);