Related tdf#92296, tdf#90812: Make this test more strict

i.e. not only make sure that rPr is there, but also test the text
chunk has the right font colour ( it went off-by-one in regression
caused by the fix of tdf#90812 )

Change-Id: I3788a845393686ed621743e117b7eb439e38e0b3

sc/qa/unit/subsequent_export-test.cxx

@@ -2685,7 +2685,8 @@ void ScExportTest::testSheetRunParagraphProperty()
     xmlDocPtr pDoc = XPathHelper::parseExport(&(*xDocSh), m_xSFactory, "xl/sharedStrings.xml", XLSX);
     CPPUNIT_ASSERT(pDoc);
 
-    assertXPath(pDoc, "/x:sst/x:si/x:r[1]/x:rPr[1]", 1);
+    OUString aColor = getXPath(pDoc, "/x:sst/x:si/x:r[1]/x:rPr[1]/x:color", "rgb");
+    CPPUNIT_ASSERT_EQUAL(OUString("FFFF0000"), aColor);
 
     xDocSh->DoClose();
 }