gdiplus/tests: Remove unneeded casts.

[Francois Gouget]

---
 dlls/gdiplus/tests/graphics.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/gdiplus/tests/graphics.c b/dlls/gdiplus/tests/graphics.c
index b0858e1..d83f3b7 100644
--- a/dlls/gdiplus/tests/graphics.c
+++ b/dlls/gdiplus/tests/graphics.c
@@ -540,9 +540,9 @@ static void test_Get_Release_DC(void)
     status = GdipGetDC(NULL, &retdc);
     expect(InvalidParameter, status);
 
-    status = GdipReleaseDC(NULL, (HDC)0);
+    status = GdipReleaseDC(NULL, NULL);
     expect(InvalidParameter, status);
-    status = GdipReleaseDC(graphics, (HDC)0);
+    status = GdipReleaseDC(graphics, NULL);
     expect(InvalidParameter, status);
     status = GdipReleaseDC(NULL, (HDC)0xdeadbeef);
     expect(InvalidParameter, status);
-- 
1.5.6.3