fix bug 5137

extensions/wallet/src/htmldlgs.h

@@ -181,12 +181,12 @@ XP_MakeHTMLDialog2(XPDialogInfo *dialogInfo) {
     const nsAutoString html_dlgs = nsAutoString(HTML_DLGS_URL);
     if (!NS_FAILED(NS_NewURL(&url, html_dlgs))) {
       res = netservice->GetCookieString(url, *nsCookie);
-    }
 
       /* convert cookie to a C string */
 
       char *cookies = nsCookie->ToNewCString();
       char *cookie = PL_strstr(cookies, "htmldlgs=|"); /* get to htmldlgs=| */
+      if (cookie) {
         cookie = cookie + PL_strlen("htmldlgs=|"); /* get passed htmldlgs=| */
 
         /* button name is first item in cookie (up to next verical bar) */
@@ -219,11 +219,11 @@ XP_MakeHTMLDialog2(XPDialogInfo *dialogInfo) {
         for (int j=0; j<argc; j++) {
           XP_FREE(argv[j]);
         }
-
+      }
       delete[] cookies;
+    }
     NS_RELEASE(netservice);
   }
-
 }
 
 XPDialogStrings *