add unittest for fdo#59240

Change-Id: Ic287228f578c9ecb0f69a47380c890e337203b31
Reviewed-on: https://gerrit.libreoffice.org/2078Reviewed-by: Tor Lillqvist <tml@iki.fi>
Tested-by: Tor Lillqvist <tml@iki.fi>

sc/qa/unit/data/contentCSV/bugFix_Sheet4.csv

+๑.๐๐

sc/qa/unit/subsequent_filters-test.cxx

@@ -903,6 +903,13 @@ void ScFiltersTest::testBugFixesODS()
         CPPUNIT_ASSERT(!pDBData->HasHeader());
     }
 
+    {
+        // fdo#59240
+        OUString aCSVFileName;
+        createCSVPath("bugFix_Sheet4.", aCSVFileName);
+        testFile(aCSVFileName, pDoc, 3);
+    }
+
     xDocSh->DoClose();
 }