winemac: Fix leaks in macdrv_surface_destroy.

[Piotr Caban]

Signed-off-by: Piotr Caban 
---
  dlls/winemac.drv/surface.c | 3 +++
  1 file changed, 3 insertions(+)

[Ken Thomases]

Signed-off-by: Ken Thomases