Synopsys   : FILTER_IS_MORTAL(x)

Defined in : /sys/filter_funs.h

Description: This filter returns an array with only those objects that are
             mortalss. Rather, it returns all objects that are nor a wizard.
             This means that if you give it dead objects (a chair), this
             will also be returned.
Arguments  : object *x - the array with objects to filter.
Returns    : object *  - an array with only objects that are mortal.
