Restore border around terminal to default background colour rather than

something outside colours[] (consistently brown on my system).

(I don't understand why this code was the way it was, but it gave the
correct result before r4917 `256-colours', and now doesn't.)

[originally from svn r5014]
[r4917 == e4e10e494b]

windows/window.c

@@ -2295,10 +2295,10 @@ static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
 		HBRUSH fillcolour, oldbrush;
 		HPEN   edge, oldpen;
 		fillcolour = CreateSolidBrush (
-				    colours[(ATTR_DEFBG>>ATTR_BGSHIFT)*2]);
+				    colours[ATTR_DEFBG>>ATTR_BGSHIFT]);
 		oldbrush = SelectObject(hdc, fillcolour);
 		edge = CreatePen(PS_SOLID, 0, 
-				    colours[(ATTR_DEFBG>>ATTR_BGSHIFT)*2]);
+				    colours[ATTR_DEFBG>>ATTR_BGSHIFT]);
 		oldpen = SelectObject(hdc, edge);
 
 		/*