Int overflow in queryparser

### Symptoms

Running `go build -o test_program_bin src/github.com/pelletier/go-toml/cmd/test_program.go` (excerpt from `test.sh`) yields `./queryparser.go:206: constant 9223372036854775807 overflows int`.

### Expected behavior

The build should finish and create the binary.

### Environment

* OS X 10.9
* Go i386 binary distribution
* GOARCH=386

### Notes

* Works fine on cross-compiled i386 linux (host is amd64 linux).