#1 Improve "const correctness"

[Markus Elfring]

Would you like to apply the advices from the article
"http://en.wikipedia.org/wiki/Const_correctness" to
your sources?
I suggest to add the key word "const" to the type
specifiers for parameters like "message" for the
function "SendStatusMessage".
http://cvs.sourceforge.net/viewcvs.py/tibiamovie/tibiamovie/tibiamovie.h?rev=1.20&view=markup