From c6b1d4472b2f339c54c9c9de06c6ebef2a92dba9 Mon Sep 17 00:00:00 2001
From: Simon Tatham <anakin@pobox.com>
Date: Sat, 5 Jul 2008 22:07:35 +0000
Subject: [PATCH] Correction from James H: sqrt(0) shouldn't occur any more
 than sqrt(1) should.

[originally from svn r8108]
---
 unfinished/numgame.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/unfinished/numgame.c b/unfinished/numgame.c
index 8f59c73..20861ca 100644
--- a/unfinished/numgame.c
+++ b/unfinished/numgame.c
@@ -542,9 +542,9 @@ static int perform_sqrt(int *a, int *b, int *output)
     int half[2] = { 1, 2 };
 
     /*
-     * sqrt(1) == 1: don't perform unary noops.
+     * sqrt(0) == 0, sqrt(1) == 1: don't perform unary noops.
      */
-    if (a[0] == 1 && a[1] == 1) return FALSE;
+    if (a[0] == 0 || (a[0] == 1 && a[1] == 1)) return FALSE;
 
     return perform_exp(a, half, output);
 }