The implementation of int_sqrt() assumes that longs have 32 bits.  On 
systems that have 64 bit longs this will result in gross errors when the 
argument to the function is greater than 2^32 - 1 on such systems. I 
doubt whether any such use is currently made of int_sqrt() but the 
attached patch fixes the problem anyway.

Signed-off-by: Peter Williams <pwil3058@bigpond.com.au>

-- 
Peter Williams                                   pwil3058@bigpond.net.au

"Learning, n. The kind of ignorance distinguishing the studious."
  -- Ambrose Bierce