From 2b502a39c643a3909f9066f88eab8d864685a1fb Mon Sep 17 00:00:00 2001
From: Eric House <eehouse@eehouse.org>
Date: Mon, 10 Jan 2011 18:19:10 -0800
Subject: [PATCH] fix mod-by-zero error when iq == 2

---
 xwords4/common/engine.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/xwords4/common/engine.c b/xwords4/common/engine.c
index 43b88417d..ae85b2fd0 100644
--- a/xwords4/common/engine.c
+++ b/xwords4/common/engine.c
@@ -392,7 +392,10 @@ normalizeIQ( EngineCtxt* engine, XP_U16 iq )
         engine->nMovesToSave = 1;
     } else {
         XP_U16 count = NUM_SAVED_ENGINE_MOVES * iq / 100;
-        engine->nMovesToSave = 1 + (XP_RANDOM() % count);
+        engine->nMovesToSave = 1;
+        if ( count > 0 ) {
+            engine->nMovesToSave += XP_RANDOM() % count;
+        }
     }
     XP_LOGF( "%s: set nMovesToSave=%d (iq=%d; NUM_SAVED_ENGINE_MOVES=%d)",
              __func__, engine->nMovesToSave, iq, NUM_SAVED_ENGINE_MOVES );