A pointer_type parsing bug

[mrlzh]

Here is an example of pointer_type parsing error.
The code '* (* [] byte)' being parsed as pointer.type is incorrect，it should be an unary_expression.

import "fmt"

func main()  {
	var sUnsafe string = "hello"
	*(*[]byte)(unsafe.Pointer(&sUnsafe))
	//*((*[]byte)(unsafe.Pointer(&sUnsafe)))
}