[libxml2] Avoid a possible NULL pointer dereference

[Daniel Veillard <veillard src gnome org>]

commit 085b997cfd0cd19481d9eecab22da5adf67bcbdc
Author: Gaurav <g gupta samsung com>
Date:   Tue Feb 18 11:47:43 2014 +0800

    Avoid a possible NULL pointer dereference
    
    For https://bugzilla.gnome.org/show_bug.cgi?id=708355

 xmlmodule.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/xmlmodule.c b/xmlmodule.c
index 7fe5bc2..50ed666 100644
--- a/xmlmodule.c
+++ b/xmlmodule.c
@@ -115,7 +115,7 @@ xmlModuleSymbol(xmlModulePtr module, const char *name, void **symbol)
 {
     int rc = -1;
 
-    if ((NULL == module) || (symbol == NULL)) {
+    if ((NULL == module) || (symbol == NULL) || (name == NULL)) {
         __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_MODULE,
                         XML_MODULE_OPEN, XML_ERR_FATAL, NULL, 0, 0,
                         NULL, NULL, 0, 0, "null parameter\n");