Bug 1321412 - Fix a bug in the definition of SizeTyped. r=kats

A second template parameter 'F' was previously added to SizeTyped, but was
not correspondingly added to the argument passed for the 'Sub' parameter
of BaseSize.

MozReview-Commit-ID: 2pRQXeWMJpP

--HG--
extra : rebase_source : c1e71b18fdb303f9684d0c9c26dca2462fa0f62d

gfx/2d/Point.h

@@ -285,7 +285,7 @@ typedef IntSizeTyped<UnknownUnits> IntSize;
 
 template<class units, class F = Float>
 struct SizeTyped :
-  public BaseSize< F, SizeTyped<units> >,
+  public BaseSize< F, SizeTyped<units, F> >,
   public units {
   static_assert(IsPixel<units>::value,
                 "'units' must be a coordinate system tag");