[cairo] protecting against too-big dimensions in XCreatePixture

[Vladimir Vukicevic]

Howdy,

This is a variant of the cairo parts in Mats' patch in https://bugzilla.mozilla.org/show_bug.cgi?id=424333 
  -- essentially, we know that creating a pixmap bigger than SHRT_MAX  
in either dimension will cause a BadAlloc error, so we can just avoid  
that situation entirely and return an error.  The patch just creates a  
simple wrapper for XCreatePixmap and moves the <= 0 checking code in  
here as well for clarity.  How's this look?

     - Vlad

-------------- next part --------------
A non-text attachment was scrubbed...
Name: xlib-create-pixmap-dims.patch
Type: application/octet-stream
Size: 3466 bytes
Desc: not available
Url : http://lists.cairographics.org/archives/cairo/attachments/20080407/2468f2ec/attachment.obj 
-------------- next part --------------