[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/mangosd/Master.cpp

@@ -293,10 +293,6 @@ int Master::Run()
 
     uint32 socketSelecttime = sWorld.getConfig(CONFIG_SOCKET_SELECTTIME);
 
-    // maximum counter for next ping
-    uint32 numLoops = (sConfig.GetIntDefault( "MaxPingTime", 30 ) * (MINUTE * 1000000 / socketSelecttime));
-    uint32 loopCounter = 0;
-
     ///- Start up freeze catcher thread
     if(uint32 freeze_delay = sConfig.GetIntDefault("MaxCoreStuckTime", 0))
     {