Merge pull request #1114 from Mr-Rm/fix-1113

fix #1113: проверка типа и значения параметра

Author: EvilBeaver

src/ScriptEngine.HostedScript/Library/Binary/DataReader.cs

@@ -185,8 +185,16 @@ public IValue SourceStream()
         /// </returns>
         ///
         [ContextMethod("Пропустить", "Skip")]
-        public long Skip(long number)
+        public long Skip(IValue value)
         {
+            if (value.DataType != DataType.Number)
+                throw RuntimeException.InvalidArgumentType();
+
+            long number = (long)value.AsNumber();
+
+            if (number < 0 || number != value.AsNumber())
+                throw RuntimeException.InvalidArgumentValue();
+            
             var stream = _reader.BaseStream;
             if (stream.CanSeek)
             {