[12374] Fix compiler warning about initialization order

Fix warning: '<class>::<member>' will be initialized after <class>::<member>" (Linux/GCC).

Signed-off-by: Schmoozerd <schmoozerd@cmangos>
[12375] Fix some signed/unsigned integer comparison warnings

Close #90 (Pull Request)

Signed-off-by: Schmoozerd <schmoozerd@cmangos>