interp: added sliceExpr and starExpr

Type check was failing for expression such as: `&(*tree)[node:][0]`, as in

```go
tree, _ := huffmanTreePool.Get().(*[]huffmanTree)
...

initHuffmanTree(&(*tree)[node:][0], histogram[l], -1, int16(l))
```

see c3da72aa01/brotli_bit_stream.go (L469)

_test/addr1.go

@@ -0,0 +1,22 @@
+package main
+
+import "fmt"
+
+type T struct {
+	A int
+	B int
+}
+
+func main() {
+	a := &[]T{
+		{1, 2},
+		{3, 4},
+	}
+	fmt.Println("a:", a)
+	x := &(*a)[1:][0]
+	fmt.Println("x:", x)
+}
+
+// Output:
+// a: &[{1 2} {3 4}]
+// x: &{3 4}

interp/typecheck.go

@@ -91,7 +91,10 @@ func (check typecheck) addressExpr(n *node) error {
 		case selectorExpr:
 			c0 = c0.child[1]
 			continue
-		case indexExpr:
+		case starExpr:
+			c0 = c0.child[0]
+			continue
+		case indexExpr, sliceExpr:
 			c := c0.child[0]
 			if isArray(c.typ) || isMap(c.typ) {
 				c0 = c