save_object() - save the values of variables in an object into a file
int save_object( string name, int flag );
Save all values of non-static variables in this object in the file
'name'. valid_write() in the master object determines whether this is
allowed. The optional second argument is a bitfield: If bit 0 is 1,
then variables that are zero (0) are also saved (normally, they
aren't). Object variables always save as 0. If bit 1 is 1, then the
save file will be compressed.
save_object() returns 1 for success, 0 for failure.