windows.offscreen:make-bitmap-image wasn't filling in the component-type of the image object it makes

basis/windows/offscreen/offscreen.factor

@@ -42,6 +42,7 @@ IN: windows.offscreen
         swap >>dim
         swap >>bitmap
         BGRX >>component-order
+        ubyte-components >>component-type
         t >>upside-down? ;
 
 : with-memory-dc ( quot: ( hDC -- ) -- )
@@ -50,4 +51,4 @@ IN: windows.offscreen
 :: make-bitmap-image ( dim dc quot -- image )
     dim dc make-bitmap [ &DeleteObject drop ] dip
     quot dip
-    dim bitmap>image ; inline
+    dim bitmap>image ; inline