gdiplus: GdipTransformRegion should not fail for an empty path.

dlls/gdiplus/region.c

@@ -1310,6 +1310,9 @@ static GpStatus transform_region_element(region_element* element, GpMatrix *matr
         }
         /* Fall-through to do the actual conversion. */
         case RegionDataPath:
+            if (!element->elementdata.pathdata.path->pathdata.Count)
+                return Ok;
+
             stat = GdipTransformMatrixPoints(matrix,
                 element->elementdata.pathdata.path->pathdata.Points,
                 element->elementdata.pathdata.path->pathdata.Count);

dlls/gdiplus/tests/region.c

@@ -381,7 +381,6 @@ static void test_getregiondata(void)
     status = GdipCreateMatrix(&matrix);
     expect(Ok, status);
     status = GdipTransformRegion(region, matrix);
-todo_wine
     expect(Ok, status);
     GdipDeleteMatrix(matrix);