Rationalize Haiku rectangle handling

Rationalize Haiku rectangle handling

* src/haiku_draw_support.cc (BView_DrawBitmapWithEraseOp):
(BView_DrawMask):
(rotate_bitmap_270):
(rotate_bitmap_90):
(BBitmap_transform_bitmap):
* src/haiku_support.cc (UnZoom):
(GetParentWidthHeight):
(MakeFullscreen):
(AttachCairoSurface):
(AfterResize):
(DrawContent):
(BView_cr_dump_clipping): Use new rectangle handling macros.

* src/haiku_support.h (BE_RECT_WIDTH, BE_RECT_HEIGHT): New
macros.