[libxslt] Fix xmlStrPrintf argument

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 6d851ac3f94bace8dc090f036f350579b1ef95fb
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Thu May 18 17:47:59 2017 +0200

    Fix xmlStrPrintf argument
    
    The type of the msg parameter of xmlStrPrintf has changed. See the
    following libxml2 commit:
    
        4472c3a Fix some format string warnings with possible format string
                vulnerability

 libxslt/extensions.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/libxslt/extensions.c b/libxslt/extensions.c
index ae6eef0..ed02de5 100644
--- a/libxslt/extensions.c
+++ b/libxslt/extensions.c
@@ -389,8 +389,7 @@ xsltExtModuleRegisterDynamic(const xmlChar * URI)
 
     /* build the module filename, and confirm the module exists */
     xmlStrPrintf((xmlChar *) module_filename, sizeof(module_filename),
-                 BAD_CAST "%s/%s%s",
-                 ext_directory, ext_name, LIBXML_MODULE_EXTENSION);
+                 "%s/%s%s", ext_directory, ext_name, LIBXML_MODULE_EXTENSION);
 
 #ifdef WITH_XSLT_DEBUG_EXTENSIONS
     xsltGenericDebug(xsltGenericDebugContext,