Under some circumstances, wcmInitArea faces a division by zero when trying to 
deal with the "KeepShape" option. The patch disables KeepShape in the 
situation.

Signed-off-by: Bruno Vasselle <[email protected]>
---
 src/xf86Wacom.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/src/xf86Wacom.c b/src/xf86Wacom.c
index e8c4710..5cdb300 100644
--- a/src/xf86Wacom.c
+++ b/src/xf86Wacom.c
@@ -116,6 +116,14 @@ static int wcmInitArea(InputInfoPtr pInfo)
        /* Maintain aspect ratio to the whole desktop
         * May need to consider a specific screen in multimonitor settings
         */
+       if ((priv->flags & KEEP_SHAPE_FLAG) &&
+           (priv->maxHeight == 0)) /* safeguard in case screen ratio is 
unknown */
+       {
+               xf86Msg(X_WARNING, 
+                       "%s: disabling option \"KeepShape\" as screen shape is 
not accessible\n",
+                       pInfo->name);
+               priv->flags &= ~KEEP_SHAPE_FLAG;
+       }
        if (priv->flags & KEEP_SHAPE_FLAG)
        {
 
-- 
1.7.4

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