From: Paulius Dilkas <paulius.dilkas@gmail.com>
Subject: [1/2] mshtml: prevents a possible crash
Message-Id: <CAN1tiJ4bOkhOsh00apA1zPXKAu+Vfaf3-_gojK1w3RZe6KwiRA@mail.gmail.com>
Date: Thu, 2 Apr 2015 16:54:21 +0300

Fixes one of the crashes caused by https://bugs.winehq.org/show_bug.cgi?id=34808
---
 dlls/mshtml/htmlstyle.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/dlls/mshtml/htmlstyle.c b/dlls/mshtml/htmlstyle.c
index 33318ff..5c43c85 100644
--- a/dlls/mshtml/htmlstyle.c
+++ b/dlls/mshtml/htmlstyle.c
@@ -484,6 +484,11 @@ static HRESULT get_nsstyle_attr_nsval(nsIDOMCSSStyleDeclaration *nsstyle, stylei
     nsAString str_name;
     nsresult nsres;
 
+    if(!nsstyle) {
+        WARN("called with a null style declaration\n");
+        return E_INVALIDARG;
+    }
+
     nsAString_InitDepend(&str_name, style_tbl[sid].name);
 
     nsres = nsIDOMCSSStyleDeclaration_GetPropertyValue(nsstyle, &str_name, value);