This function will search the invoking character's inventory for any broken
items, and will return their item ID numbers. Since the character may have
several broken items, 0 given as an argument will return the first one found, 1
will return the second one, etc. Will return 0 if no such item is found.

// Let's see if they have anything broken:
if (getbrokenid(0)==0) goto Skip;
// They do, so let's print the name of the first broken item:
mes "Oh, I see you have a broken "+getitemname(getbrokenid(0))+" here!";
Skip:
mes "You don't have anything broken, quit bothering me.";