gc: fix up floating point NaN comparisons

Fixes #167.

R=ken2
https://golang.org/cl/155062
7 files changed
tree: 3f13b8854fd0f1cfae092fa40100440e93b3b3c1
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  3. lib/
  4. misc/
  5. pkg/
  6. src/
  7. test/
  8. .hgignore
  9. .hgtags
  10. AUTHORS
  11. CONTRIBUTORS
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  13. LICENSE
  14. README