libbb: use narrow isqrt() when 64-bit one is not needed (only "factor" uses it)

function                                             old     new   delta
isqrt_ull                                              -      84     +84
create_J                                            1809    1808      -1
isqrt                                                106      38     -68
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/2 up/down: 84/-69)             Total: 15 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/coreutils/factor.c b/coreutils/factor.c
index 90e9ed761..4df523f28 100644
--- a/coreutils/factor.c
+++ b/coreutils/factor.c
@@ -136,7 +136,7 @@ static void factorize(wide_t N);
 
 static half_t isqrt_odd(wide_t N)
 {
-        half_t s = isqrt(N);
+        half_t s = isqrt_ull(N);
         /* s^2 is <= N, (s+1)^2 > N */
 
         /* If s^2 in fact is EQUAL to N, it's very lucky.