* accept all NaNs, not just the one sys.NaN() returns. * use union, not cast, to convert between uint64 and float64,   to avoid possible problems with gcc in future.
* accept all NaNs, not just the one sys.NaN() returns.
* use union, not cast, to convert between uint64 and float64,
  to avoid possible problems with gcc in future.

R=r
DELTA=75  (39 added, 15 deleted, 21 changed)
OCL=18926
CL=18926

apparentlymart/golang,ssrl/go,pombredanne/go-deleteme,tv42/old-go,bdwalton/debian-golang,wesolows/golang-old,tianon/debian-golang,tv42/old-go,dsriram/golang,tianon/debian-golang,nightlyone/golang,tv42/old-go,apparentlymart/golang,nightlyone/golang,wesolows/golang-old,bdwalton/debian-golang,wesolows/golang,pombredanne/go-deleteme,firebitsbr/golang-old,firebitsbr/golang-old,nightlyone/golang,h8liu/golang,firebitsbr/golang-old,tianon/debian-golang,apparentlymart/golang,h8liu/golang,wesolows/golang,wesolows/golang-old,h8liu/golang,tv42/old-go,pombredanne/go-deleteme,tv42/old-go,wesolows/golang,ssrl/go,wesolows/golang,apparentlymart/golang,apparentlymart/golang,dsriram/golang,gnanderson/go,pombredanne/go-deleteme,bdwalton/debian-golang,tianon/debian-golang,firebitsbr/golang-old,wesolows/golang-old,tianon/debian-golang,pombredanne/go-deleteme,wesolows/golang-old,bdwalton/debian-golang,ssrl/go,tianon/debian-golang,dsriram/golang,wesolows/golang,gnanderson/go,h8liu/golang,apparentlymart/golang,tianon/debian-golang,nightlyone/golang,pombredanne/go-deleteme,bdwalton/debian-golang,h8liu/golang,wesolows/golang,nightlyone/golang,dsriram/golang,tv42/old-go,firebitsbr/golang-old,gnanderson/go,bdwalton/debian-golang,tianon/debian-golang,gnanderson/go,nightlyone/golang,tv42/old-go,dsriram/golang,wesolows/golang-old,gnanderson/go,apparentlymart/golang,ssrl/go,bdwalton/debian-golang,dsriram/golang,pombredanne/go-deleteme,h8liu/golang,wesolows/golang,gnanderson/go,ssrl/go,firebitsbr/golang-old,ssrl/go,bdwalton/debian-golang,firebitsbr/golang-old,ssrl/go,firebitsbr/golang-old,nightlyone/golang,h8liu/golang,wesolows/golang-old,dsriram/golang,gnanderson/go