runtime: fix bug introduced in revision 4a01b8d28570
runtime: fix bug introduced in revision 4a01b8d28570

R=rsc
CC=golang-dev
http://codereview.appspot.com/1874046

Committer: Alex Brainman <54ba58c8441b5eff861de6b4e5ee46baf086b142@gmail.com>

pombredanne/go-deleteme,ssrl/go,pombredanne/go-deleteme,dsriram/golang,apparentlymart/golang,dsriram/golang,tv42/old-go,h8liu/golang,ssrl/go,apparentlymart/golang,h8liu/golang,tv42/old-go,gnanderson/go,gnanderson/go,dsriram/golang,pombredanne/go-deleteme,gnanderson/go,apparentlymart/golang,dsriram/golang,tv42/old-go,apparentlymart/golang,apparentlymart/golang,pombredanne/go-deleteme,ssrl/go,h8liu/golang,h8liu/golang,dsriram/golang,pombredanne/go-deleteme,gnanderson/go,dsriram/golang,apparentlymart/golang,pombredanne/go-deleteme,dsriram/golang,tv42/old-go,gnanderson/go,ssrl/go,ssrl/go,tv42/old-go,pombredanne/go-deleteme,apparentlymart/golang,h8liu/golang,ssrl/go,h8liu/golang,gnanderson/go,gnanderson/go,tv42/old-go,h8liu/golang,ssrl/go,tv42/old-go