Fix some bugs where round was actually roundNr

Now round (0 based) is always used

VocaluxeLib/CHelper.cs

@@ -47,6 +47,15 @@ namespace VocaluxeLib
             return (int)result;
         }
 
+        public static T Clamp<T>(this T val, T min, T max) where T : IComparable<T>
+        {
+            if (val.CompareTo(min) < 0)
+                return min;
+            if (val.CompareTo(max) > 0)
+                return max;
+            return val;
+        }
+
         /// <summary>
         ///     Concat strings into one string with ", " as separator.
         /// </summary>