pointer <-> integer conversion warnings (bogus -Wall warnings)

[Tom Lord]

   From: Fergus Henderson <fjh@cs.mu.OZ.AU>
   I just want to say that I too found these warnings extremely useful when
   porting Mercury and CLP(R) to a 64-bit target (dec-alpha-osf*).

Being able to generate such warnings is certainly useful.  I'll ask for 
them if I want them.

For decades, however, the meaning of an explicit cast for a dangerous
conversion that would be performed by default has been "Don't issue
warnings for this.".  That interpretation has given us a way to write
programs that use dangerous conversions carefully and compile cleanly.

If I want `lint', I know where to find it and how to write an up-to-date
version.

-t