01/01: [SHELL32] CDefViewBckgrndMenu: Fix a crash when pasting on a new explorer window.

[Mark Jansen]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=058c2658a43a2ea2f155b…

commit 058c2658a43a2ea2f155be0c8b7ecf97c2ae18d3
Author:     Mark Jansen <mark.jansen(a)reactos.org>
AuthorDate: Mon Feb 5 17:12:00 2018 +0100
Commit:     Mark Jansen <mark.jansen(a)reactos.org>
CommitDate: Mon Feb 5 17:39:32 2018 +0100

    [SHELL32] CDefViewBckgrndMenu: Fix a crash when pasting on a new explorer window.
---
 dll/win32/shell32/CDefViewBckgrndMenu.cpp | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/dll/win32/shell32/CDefViewBckgrndMenu.cpp
b/dll/win32/shell32/CDefViewBckgrndMenu.cpp
index 281366ac26..2fc6f1ac02 100644
--- a/dll/win32/shell32/CDefViewBckgrndMenu.cpp
+++ b/dll/win32/shell32/CDefViewBckgrndMenu.cpp
@@ -210,7 +210,12 @@ CDefViewBckgrndMenu::InvokeCommand(LPCMINVOKECOMMANDINFO lpcmi)
     UINT idCmd = LOWORD(lpcmi->lpVerb);
     if(HIWORD(lpcmi->lpVerb) != 0 || idCmd < m_LastFolderCMId)
     {
-        return m_folderCM->InvokeCommand(lpcmi);
+        if (m_folderCM)
+        {
+            return m_folderCM->InvokeCommand(lpcmi);
+        }
+        WARN("m_folderCM is NULL!\n");
+        return E_NOTIMPL;
     }
 
     /* The default part of the background menu doesn't have shifted ids so we need to
convert the id offset to the real id */
@@ -221,8 +226,13 @@ CDefViewBckgrndMenu::InvokeCommand(LPCMINVOKECOMMANDINFO lpcmi)
     {
     case FCIDM_SHVIEW_INSERT:
     case FCIDM_SHVIEW_INSERTLINK:
-        lpcmi->lpVerb = MAKEINTRESOURCEA(idCmd);
-        return m_folderCM->InvokeCommand(lpcmi);
+        if (m_folderCM)
+        {
+            lpcmi->lpVerb = MAKEINTRESOURCEA(idCmd);
+            return m_folderCM->InvokeCommand(lpcmi);
+        }
+        WARN("m_folderCM is NULL!\n");
+        return E_NOTIMPL;
     case FCIDM_SHVIEW_BIGICON:
     case FCIDM_SHVIEW_SMALLICON:
     case FCIDM_SHVIEW_LISTVIEW: