gdiplus: Fix uninitialized value jump and a leak in GdipAddPathPolygon test.

dlls/gdiplus/tests/graphicspath.c

@@ -602,6 +602,8 @@ static void test_polygon(void)
     points[4].X = 20.0;
     points[4].Y = 0.0;
 
+    GdipCreatePath(FillModeAlternate, &path);
+
     /* NULL args */
     status = GdipAddPathPolygon(NULL, points, 5);
     expect(InvalidParameter, status);
@@ -611,7 +613,6 @@ static void test_polygon(void)
     status = GdipAddPathPolygon(path, points, 2);
     expect(InvalidParameter, status);
 
-    GdipCreatePath(FillModeAlternate, &path);
     /* to test how it prolongs not empty path */
     status = GdipAddPathLine(path, 5.0, 5.0, 6.0, 8.0);
     expect(Ok, status);
@@ -619,6 +620,8 @@ static void test_polygon(void)
     expect(Ok, status);
     /* check resulting path */
     ok_path(path, poly_path, sizeof(poly_path)/sizeof(path_test_t), FALSE);
+
+    GdipDeletePath(path);
 }
 
 static path_test_t rect_path[] = {