[8475] fixed some gcc-warnings

all warnings from Wunused
and some from Wall

cause unused may be most interesting for some:
they were in following files:
src/game/Level2.cpp
src/game/Map.cpp
src/game/SpellAuras.cpp
src/game/Unit.cpp
src/mangosd/Master.cpp
but i guess mostly someone just fogot to remove this code

for some unsigned vs signed warnings i used:
ack "for.*int .*size\(\)" | ack -v uint

also note for coding:
if you do something like
    if( a && b || c)
just place parentheses around (a && b) && always will have
precedence over || but without parentheses this could be overseen
quite fast (at least that's my guess why gcc will warn for this)

Signed-off-by: balrok <der-coole-carl@gmx.net>

src/game/Chat.cpp

@@ -1177,7 +1177,7 @@ valid examples:
                     char c = reader.peek();
 
                     // ignore enchants etc.
-                    while(c >='0' && c <='9' || c==':')
+                    while ((c >= '0' && c <= '9') || c== ':')
                     {
                         reader.ignore(1);
                         c = reader.peek();
@@ -2201,4 +2201,4 @@ LocaleConstant CliHandler::GetSessionDbcLocale() const
 int CliHandler::GetSessionDbLocaleIndex() const
 {
     return objmgr.GetDBCLocaleIndex();
-}
+}