[10099] Prevent retunr mails to not existed characters.

[newsbot]

<pre>m src/game/Mail.cpp
m src/shared/revision_nr.h

[10099] Prevent retunr mails to not existed characters.

Thanks to laviniu for find bug.</pre>



Дальше... (http://github.com/mangos/mangos/commit/f8e853d8f62f421082b8b323fc96690edae8e316)