[rfa] fix invidious casting bug in infptrace.c with 64-bit CORE_ADDR

[Andrew Cagney]

> 2001-07-25  Daniel Jacobowitz  <drow@mvista.com>
> 
> * infptrace.c (child_xfer_memory): Add cast to CORE_ADDR.
> 
> 

Yes, ok.  Nasty.  I'd do a grep around as I noticed what looks like the same bug in gdbserver.


	Andrew