handle negative numeric constants in import. (fixes bugs/bug106)
handle negative numeric constants in import.
(fixes bugs/bug106)

package bug0
export const A = -1

package bug1
import "bug0"

R=ken
DELTA=21  (19 added, 0 deleted, 2 changed)
OCL=15901
CL=15968
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go