Use const.
Add __noreturn__ attributes.
Add a __format__ attribute.
Add __unused__ attributes.
Use symbolic constants for open() and lseek().
Declare types of all function parameters; convert some function
definitions to ISO C form.
Ensure standard file descriptors are open on startup.
Check for errors writing output of makedefs.
Avoid duplicate definitions of variables.
hack.invent.c: In function `dolook':
hack.invent.c:800: warning: `otmp0' might be used uninitialized in this function
hack.invent.c:801: warning: `gold' might be used uninitialized in this function
(this is awfully tiresome - can't we fix gcc?)
