Patch for bad border rendering on 965 w/ EXA+Compiz

[Bryce Harrington]

With -intel 2:2.2.0+git20080107-1ubuntu2 on 965GM, using EXA and Compiz,
the borders of windows are drawn incorrectly:

 http://bryceharrington.org/files/borders-bad.png

Poking around a bit, I came up with the patch below which makes the
issue go away.  Probably this is just covering up a real problem deeper
down, so feedback would be appreciated.

Bryce

--- i965_render.c-orig	2008-01-08 02:18:58.000000000 +0000
+++ i965_render.c	2008-01-21 18:11:16.000000000 +0000
@@ -377,10 +377,12 @@ i965_check_rotation_transform(PictTransf
     int a, b;
     a = xFixedToInt(t->matrix[0][1]);
     b = xFixedToInt(t->matrix[1][0]);
-    if (a == -1 && b == 1)
+    if (a == 0 && b == 1)
 	return TRUE;
-    else if (a == 1 && b == -1)
+    else if (a == 1 && b == 0)
 	return TRUE;
+    else if (a != 0 && b != 0)
+        return TRUE;
     else
 	return FALSE;
 }