Fix com_users password reset bug.
Fix com_users password reset bug.

Activation field was not set to an empty string after resetting the password.

timble/kodekit-platform,timble/kodekit-platform,nooku/nooku-platform,timble/kodekit-platform,nooku/nooku-platform,timble/kodekit-platform,nooku/nooku-platform,nooku/nooku-platform,nooku/nooku-platform,timble/kodekit-platform