[libxml2] 594514 memory leaks - duplicate initialization

[Daniel Veillard <veillard src gnome org>]

commit 44d1eff028ad103a3f33699d0d62b0468664c103
Author: MOD <mrmodbox gmail com>
Date:   Wed Sep 9 19:03:13 2009 +0200

    594514 memory leaks - duplicate initialization
    
    * globals.c: xmlInitGlobals() might be called multiple times, leaking
      the xmlThrDefMutex value

 globals.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/globals.c b/globals.c
index 9b4a551..1f807d8 100644
--- a/globals.c
+++ b/globals.c
@@ -46,7 +46,8 @@ static xmlMutexPtr xmlThrDefMutex = NULL;
  */
 void xmlInitGlobals(void)
 {
-    xmlThrDefMutex = xmlNewMutex();
+    if (xmlThrDefMutex != NULL)
+        xmlThrDefMutex = xmlNewMutex();
 }
 
 /**