[libxslt] QName parsing fix for patterns

[Daniel Veillard <veillard src gnome org>]

commit a3a1d4891c0e28bb1a43582b2aef4a637fe97cfc
Author: Martin <gzlist googlemail com>
Date:   Thu Sep 17 09:59:42 2009 +0200

    QName parsing fix for patterns
    
    * libxslt/pattern.c: fix a corner case and avoid a memory leak on
      error

 libxslt/pattern.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/libxslt/pattern.c b/libxslt/pattern.c
index 815013b..c435367 100644
--- a/libxslt/pattern.c
+++ b/libxslt/pattern.c
@@ -1420,7 +1420,7 @@ xsltScanQName(xsltParserContextPtr ctxt, xmlChar **prefix) {
 
     *prefix = NULL;
     ret = xsltScanNCName(ctxt);
-    if (CUR == ':') {
+    if (ret && CUR == ':') {
         *prefix = ret;
 	NEXT;
 	ret = xsltScanNCName(ctxt);
@@ -1669,6 +1669,7 @@ xsltCompileStepPattern(xsltParserContextPtr ctxt, xmlChar *token, int novar) {
 		xsltTransformError(NULL, NULL, NULL,
 	    "xsltCompileStepPattern : no namespace bound to prefix %s\n",
 				 prefix);
+		xmlFree(prefix);
 		ctxt->error = 1;
 		goto error;
 	    } else {