tdf#108926: Notes placeholder text boxes not shown in PPTs

Regression from:
acb2943c

Call this placeholder related code not only for
normal slide pages.

Change-Id: Iae185ac7e5d2505554692045516cc51dbdcd735b
Reviewed-on: https://gerrit.libreoffice.org/41517Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tamás Zolnai <tamas.zolnai@collabora.com>

sd/qa/unit/import-tests.cxx

@@ -171,6 +171,7 @@ public:
     void testSmartArtRotation();
     void testTdf109223();
     void testTdf109187();
+    void testTdf108926();
 
     bool checkPattern(sd::DrawDocShellRef const & rDocRef, int nShapeNumber, std::vector<sal_uInt8>& rExpected);
     void testPatternImport();
@@ -250,6 +251,7 @@ public:
     CPPUNIT_TEST(testSmartArtRotation);
     CPPUNIT_TEST(testTdf109223);
     CPPUNIT_TEST(testTdf109187);
+    CPPUNIT_TEST(testTdf108926);
 
     CPPUNIT_TEST_SUITE_END();
 };
@@ -2431,6 +2433,23 @@ void SdImportTest::testTdf109187()
     xDocShRef->DoClose();
 }
 
+void SdImportTest::testTdf108926()
+{
+    sd::DrawDocShellRef xDocShRef = loadURL(m_directories.getURLFromSrc("sd/qa/unit/data/pptx/tdf108926.ppt"), PPT);
+    uno::Reference< presentation::XPresentationPage > xPage (getPage(0, xDocShRef), uno::UNO_QUERY_THROW);
+    uno::Reference< drawing::XDrawPage > xNotesPage (xPage->getNotesPage(), uno::UNO_QUERY_THROW);
+    CPPUNIT_ASSERT_EQUAL(static_cast<sal_Int32>(2), xNotesPage->getCount());
+
+    // Second object should be imported as an empty presentation shape
+    uno::Reference< beans::XPropertySet > xPresentationShape(xNotesPage->getByIndex(1), uno::UNO_QUERY);
+    CPPUNIT_ASSERT(xPresentationShape.is());
+    bool bIsEmptyPresObject = false;
+    xPresentationShape->getPropertyValue( "IsEmptyPresentationObject" )  >>= bIsEmptyPresObject;
+    CPPUNIT_ASSERT(bIsEmptyPresObject);
+
+    xDocShRef->DoClose();
+}
+
 CPPUNIT_TEST_SUITE_REGISTRATION(SdImportTest);
 
 CPPUNIT_PLUGIN_IMPLEMENT();