Function set_droppable:
Defined in module m_gettable (file: /std/modules/m_gettable.c)

set_droppable(1) makes an object droppable, while set_droppable(0) makes
it not droppable.  If a function or string is passed, this has the
same effect as calling set_dropmsg().

Prototype:
void set_droppable( int g );
