lok: Fix crash due to non-initialized callback.

Yay for unit tests! :-)

Change-Id: I06b3f929b53d5c03f5722acfdaf0eaf841325e34

desktop/qa/desktop_lib/test_desktop_lib.cxx

@@ -394,16 +394,25 @@ void DesktopLOKTest::testRowColumnHeaders()
 void DesktopLOKTest::testCommandResult()
 {
     LibLODocument_Impl* pDocument = loadDoc("blank_text.odt");
-    pDocument->pClass->registerCallback(pDocument, &DesktopLOKTest::callback, this);
 
     // the postUnoCommand() is supposed to be async, let's test it safely
     // [no idea if it is async in reality - most probably we are operating
     // under some solar mutex or something anyway ;-) - but...]
-    m_aCommandResultCondition.reset();
+    TimeValue aTimeValue = { 2 , 0 }; // 2 seconds max
 
+    // nothing is triggered when we have no callback yet, we just time out on
+    // the condition var.
+    m_aCommandResultCondition.reset();
     pDocument->pClass->postUnoCommand(pDocument, ".uno:Bold", 0, true);
+    m_aCommandResultCondition.wait(aTimeValue);
 
-    TimeValue aTimeValue = { 2 , 0 }; // 2 seconds max
+    CPPUNIT_ASSERT(m_aCommandResult.isEmpty());
+
+    // but we get some real values when the callback is set up
+    pDocument->pClass->registerCallback(pDocument, &DesktopLOKTest::callback, this);
+
+    m_aCommandResultCondition.reset();
+    pDocument->pClass->postUnoCommand(pDocument, ".uno:Bold", 0, true);
     m_aCommandResultCondition.wait(aTimeValue);
 
     boost::property_tree::ptree aTree;

desktop/source/lib/init.cxx

@@ -269,8 +269,10 @@ static void doc_setView(LibreOfficeKitDocument* pThis, int nId);
 static int doc_getView(LibreOfficeKitDocument* pThis);
 static int doc_getViews(LibreOfficeKitDocument* pThis);
 
-LibLODocument_Impl::LibLODocument_Impl(const uno::Reference <css::lang::XComponent> &xComponent) :
-    mxComponent( xComponent )
+LibLODocument_Impl::LibLODocument_Impl(const uno::Reference <css::lang::XComponent> &xComponent)
+    : mxComponent(xComponent)
+    , mpCallback(nullptr)
+    , mpCallbackData(nullptr)
 {
     if (!(m_pDocumentClass = gDocumentClass.lock()))
     {