skip SkipImages unit test on Windows

(temporarily, while fixing the segmentation fault in Tinderbox)

Change-Id: Iddc1a14b0cdd8a20ac90fff175e99f60972672a1

sw/qa/extras/globalfilter/globalfilter.cxx

@@ -43,7 +43,9 @@ public:
     CPPUNIT_TEST(testCharHighlight);
     CPPUNIT_TEST(testMSCharBackgroundEditing);
     CPPUNIT_TEST(testCharBackgroundToHighlighting);
+#if !defined(WNT)
     CPPUNIT_TEST(testSkipImages);
+#endif
     CPPUNIT_TEST_SUITE_END();
 };