return *os.Error instead of bool from strconv.ato*

R=r
DELTA=137  (56 added, 4 deleted, 77 changed)
OCL=19505
CL=19522
6 files changed
tree: 500b9a192188c7c743f5f6cbbfe5a1cb6fd0e33c
  1. doc/
  2. include/
  3. lib/
  4. pkg/
  5. src/
  6. test/
  7. usr/