[xmlsec] make sure buf is always freed

[Aleksey Sanin <aleksey src gnome org>]

commit bab3196021121ee3ad004c9b06fdd13ddc03a092
Author: Aleksey Sanin <aleksey aleksey com>
Date:   Wed Jun 4 09:10:03 2014 -0700

    make sure buf is always freed

 src/transforms.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/transforms.c b/src/transforms.c
index 8a2ded2..eda21c7 100644
--- a/src/transforms.c
+++ b/src/transforms.c
@@ -932,6 +932,9 @@ xmlSecTransformCtxSetUri(xmlSecTransformCtxPtr ctx, const xmlChar* uri, xmlNodeP
                         XMLSEC_ERRORS_R_XMLSEC_FAILED,
                         "transform=%s",
                         xmlSecErrorsSafeString(xmlSecTransformKlassGetName(xmlSecTransformXPointerId)));
+            if(buf != NULL) {
+                xmlFree(buf);
+            }
             return(-1);
         }
 
@@ -965,6 +968,9 @@ xmlSecTransformCtxSetUri(xmlSecTransformCtxPtr ctx, const xmlChar* uri, xmlNodeP
                         XMLSEC_ERRORS_R_XMLSEC_FAILED,
                         "transform=%s",
                         xmlSecErrorsSafeString(xmlSecTransformKlassGetName(xmlSecTransformVisa3DHackId)));
+            if(buf != NULL) {
+                xmlFree(buf);
+            }
             return(-1);
         }