Corrected typo in doc for extractBasis

docs/api/math/Matrix4.html

@@ -168,7 +168,7 @@ m, n, o, p
 		then the [page:Vector3 xAxis], [page:Vector3 yAxis], [page:Vector3 zAxis] will be set to:
 		<code>
 xAxis = (a, e, i)
-yAxis = (d, f, j)
+yAxis = (b, f, j)
 zAxis = (c, g, k)
 		</code>
 		</div>