gccgo: delete on nil map must not panic

[griesemer]

cat x.go:

package main

func main() {
    var m map[int]int
    delete(m, 0)
}

$ gccgo x.go && a.out
panic: runtime error: deletion of entry in nil map

With the recent spec change (rev d09a8b21b517), delete on nil maps is a no-op.

[ianlancetaylor]

Comment 1:

Fixed on tip.

Status changed to Fixed.