Add assert(this != &rule) in Rule::CopyFrom().

It does not make any sense to copy a Rule object onto itself.

R=rouslan@chromium.org
BUG=

Review URL: https://codereview.appspot.com/115150043
1 file changed
tree: 00b28dc3b1b59193bde185866ec9085c3e74662e
  1. cpp/
  2. externals/
  3. java/
  4. testdata/
  5. .gitmodules
  6. codereview.settings