Empty file will cause panic

[zzjha-cn]

what i meet:
when read a empty orc file (no header and footer , zero byte), this program will get a panic.

the file: read.go

func (r *Reader) extractMetaInfoFromFooter() error {
....
}

how to reproduce

• touch test.orc
• in golang file:
  orc.Open("./test.orc")
• panic: runtime error: out of range [-1]