cmd/compile: wrong column position for "missing return" error

[mdempsky]

$ cat t.go
package p

func f() int {}
$ go tool compile t.go
t.go:3:0: missing return at end of function

The error should be at column position 15 (the rbrace).

(Fix forthcoming, just reserving an issue number for fixedbugs.)

[gopherbot]

CL https://golang.org/cl/38291 mentions this issue.