* functions checking if a player is attached as soon as possible.
* functions that required a player attached and would crash if none was
there terminate the script now. (others keep the current behaviour to
maintain full backward compatibility)
* removed the unused flag argument in guildskill.
* bonus,bonus2,bonus3,bonus4 use the same function now (remains the same
script-wise)
* added an optional parameter to setcart,setfalcon,setriding so it's
possible to remove the cart/falcon/mount or select a specific cart
* other cleanups
git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@9636 54d463be-8e91-2dee-dedb-b68131a5f0ec
4b78fc3c9f