# HG changeset patch
# User Thinker K.F. Li <thinker@codemud.net>
# Date 1292762843 -28800
# Node ID 45fcbd54e873dfd5d843a6e5e5ce66bf5995ddbf
# Parent  bd0cfb8666b8914bb9457e46e9c3a03d1800721a
Fix issue of divided by zero for tank

diff -r bd0cfb8666b8 -r 45fcbd54e873 examples/tank/enemy.c
--- a/examples/tank/enemy.c	Sun Dec 19 17:56:23 2010 +0800
+++ b/examples/tank/enemy.c	Sun Dec 19 20:47:23 2010 +0800
@@ -234,6 +234,9 @@
 	return;
     }
     
+    if(all_interest == 0)	/* all nearby places are occupied */
+	return;
+
     interest_dir = (rand() % all_interest) + 1;
     for(i = 0; i < 3; i++) {
 	chk_dir = (dir + 3  + i) % 4;