riched20: Return E_INVALIDARG for empty ppSel in ITextDocument::GetSelection.

[Jactry Zeng]

---
dlls/riched20/richole.c | 3 +++
dlls/riched20/tests/richole.c | 3 +++
2 files changed, 6 insertions(+)
-------------- next part --------------
From 058096f56c7ab880e86a5489acd9fa633374f833 Mon Sep 17 00:00:00 2001
From: Jactry Zeng <jactry92 at gmail.com>
Date: Tue, 25 Mar 2014 23:53:59 +0800
Subject: riched20: Return E_INVALIDARG for empty ppSel in
 ITextDocument::GetSelection.

---
 dlls/riched20/richole.c       | 3 +++
 dlls/riched20/tests/richole.c | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/dlls/riched20/richole.c b/dlls/riched20/richole.c
index 6805873..bec228e 100644
--- a/dlls/riched20/richole.c
+++ b/dlls/riched20/richole.c
@@ -515,6 +515,9 @@ ITextDocument_fnGetSelection(ITextDocument* me, ITextSelection** ppSel)
 {
     IRichEditOleImpl *This = impl_from_ITextDocument(me);
     TRACE("(%p)\n", me);
+
+    if(!ppSel)
+      return E_INVALIDARG;
     *ppSel = &This->txtSel->ITextSelection_iface;
     ITextSelection_AddRef(*ppSel);
     return S_OK;
diff --git a/dlls/riched20/tests/richole.c b/dlls/riched20/tests/richole.c
index 5bfb999..5a3ffbe 100644
--- a/dlls/riched20/tests/richole.c
+++ b/dlls/riched20/tests/richole.c
@@ -117,6 +117,9 @@ static void test_Interfaces(void)
   ok(hres == S_OK, "IRichEditOle_QueryInterface\n");
   ok(txtDoc != NULL, "IRichEditOle_QueryInterface\n");
 
+  hres = ITextDocument_GetSelection(txtDoc, NULL);
+  ok(hres == E_INVALIDARG, "ITextDocument_GetSelection: 0x%x\n", hres);
+
   ITextDocument_GetSelection(txtDoc, &txtSel);
 
   punk = NULL;
-- 
1.8.3.2