[libxslt] Null-terminate result string of cry:rc4_decrypt

[Daniel Veillard <veillard src gnome org>]

commit 3195073c740be579892c08cfc02efeae1a1c0dbd
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Tue Jul 31 21:27:51 2012 +0200

    Null-terminate result string of cry:rc4_decrypt
    
    For https://bugzilla.gnome.org/show_bug.cgi?id=675917
    
    The string wasn't 0 terminated

 libexslt/crypto.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/libexslt/crypto.c b/libexslt/crypto.c
index e2700d6..42ac6c5 100644
--- a/libexslt/crypto.c
+++ b/libexslt/crypto.c
@@ -752,7 +752,7 @@ exsltCryptoRc4DecryptFunction (xmlXPathParserContextPtr ctxt, int nargs) {
     ret_len = exsltCryptoHex2Bin (str, str_len, bin, bin_len);
 
 /* decrypt the binary blob */
-    ret = xmlMallocAtomic (ret_len);
+    ret = xmlMallocAtomic (ret_len + 1);
     if (ret == NULL) {
 	xsltTransformError(tctxt, NULL, tctxt->inst,
 	    "exsltCryptoRc4EncryptFunction: Failed to allocate result\n");
@@ -761,6 +761,7 @@ exsltCryptoRc4DecryptFunction (xmlXPathParserContextPtr ctxt, int nargs) {
 	goto done;
     }
     PLATFORM_RC4_DECRYPT (ctxt, padkey, bin, ret_len, ret, ret_len);
+    ret[ret_len] = 0;
 
     xmlXPathReturnString (ctxt, ret);