coverity#1130363 Unchecked dynamic_cast

Change-Id: Ibc1e6f5e7c7f2a0546847194de5f77ab51b2d578

sw/qa/extras/odfimport/odfimport.cxx

@@ -366,6 +366,7 @@ DECLARE_ODFIMPORT_TEST(testFdo37606, "fdo37606.odt")
 DECLARE_ODFIMPORT_TEST(testFdo37606Copy, "fdo37606.odt")
 {
     SwXTextDocument* pTxtDoc = dynamic_cast<SwXTextDocument *>(mxComponent.get());
+    CPPUNIT_ASSERT(pTxtDoc);
     SwWrtShell* pWrtShell = pTxtDoc->GetDocShell()->GetWrtShell();
     // Ctrl-A
     pWrtShell->SelAll();