Fixes wrong data being inserted into the database (i.e explored zones).
More info in #13493Fixes#13493
Thanks to @jackpoz for finding the code issue and @Vavehl for an expectional bug report.
Conflicts:
src/server/game/Entities/Player/Player.cpp
src/server/game/Globals/ObjectMgr.cpp
src/server/scripts/Commands/cs_misc.cpp
src/server/scripts/Commands/cs_modify.cpp