[conformal/btcwallet] e3769b: Add the new ErrInvalidKeyType to the stringer map.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcwallet
  Commit: e3769bcec6fc6ac525a96c2c2f360eadd97b4232
      
https://github.com/conformal/btcwallet/commit/e3769bcec6fc6ac525a96c2c2f360eadd97b4232
  Author: Dave Collins <da...@conformal.com>
  Date:   2014-10-31 (Fri, 31 Oct 2014)

  Changed paths:
    M waddrmgr/error.go
    M waddrmgr/error_test.go

  Log Message:
  -----------
  Add the new ErrInvalidKeyType to the stringer map.

Also add it to the stringer test.