gdiplus/tests: Add more checks to the GdipGetPathData test.

dlls/gdiplus/tests/graphicspath.c

@@ -156,15 +156,16 @@ static void test_getpathdata(void)
     GpStatus status;
     INT count;
 
-    GdipCreatePath(FillModeAlternate, &path);
+    status = GdipCreatePath(FillModeAlternate, &path);
+    expect(Ok, status);
     status = GdipAddPathLine(path, 5.0, 5.0, 100.0, 50.0);
     expect(Ok, status);
 
-    /* Prepare storage. Made by wrapper class. */
     status = GdipGetPointCount(path, &count);
     expect(Ok, status);
+    expect(2, count);
 
-    data.Count  = 2;
+    data.Count  = count;
     data.Types  = GdipAlloc(sizeof(BYTE) * count);
     data.Points = GdipAlloc(sizeof(PointF) * count);