X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=hacks%2Ftwang.c;h=79bbd8f735b6b10cfef31bdc595e2e96a001c9a0;hp=ce22944fca1c22b38cceacb54a1030f856961813;hb=07faf451b99879183ed7e909e43a0e065be1ee7f;hpb=49f5b54f312fe4ac2e9bc47581a72451bd0e8439

diff --git a/hacks/twang.c b/hacks/twang.c
index ce22944f..79bbd8f7 100644
--- a/hacks/twang.c
+++ b/hacks/twang.c
@@ -554,8 +554,8 @@ static void setupModel (struct state *st)
 	st->tileSize = st->windowHeight / 2;
     }
 
-    st->columns = st->windowWidth / st->tileSize;
-    st->rows = st->windowHeight / st->tileSize;
+    st->columns = st->tileSize ? st->windowWidth / st->tileSize : 0;
+    st->rows = st->tileSize ? st->windowHeight / st->tileSize : 0;
 
     if ((st->maxColumns != 0) && (st->columns > st->maxColumns))
     {