[libxslt] Fix potential crash on debug of extensions Solaris

[Daniel Veillard <veillard src gnome org>]

commit 75a4778f7e955c24f3c1e3fb659c204fd7df7b40
Author: Ben Walton <bwalton artsci utoronto ca>
Date:   Mon Aug 17 11:19:48 2009 +0200

    Fix potential crash on debug of extensions Solaris
    
    * libxslt/extensions.c: avoid a printf("%s", NULL) in special
      circumstances

 libxslt/extensions.c |   15 ++++++++-------
 1 files changed, 8 insertions(+), 7 deletions(-)
---
diff --git a/libxslt/extensions.c b/libxslt/extensions.c
index 530516b..3b99de8 100644
--- a/libxslt/extensions.c
+++ b/libxslt/extensions.c
@@ -375,16 +375,17 @@ xsltExtModuleRegisterDynamic(const xmlChar * URI)
     /* determine module directory */
     ext_directory = (xmlChar *) getenv("LIBXSLT_PLUGINS_PATH");
 
+    if (NULL == ext_directory) {
+        ext_directory = BAD_CAST LIBXSLT_DEFAULT_PLUGINS_PATH();
+	if (NULL == ext_directory)
+	  return (-1);
+    }
 #ifdef WITH_XSLT_DEBUG_EXTENSIONS
-    xsltGenericDebug(xsltGenericDebugContext,
-                     "LIBXSLT_PLUGINS_PATH is %s\n", ext_directory);
+    else
+      xsltGenericDebug(xsltGenericDebugContext,
+		       "LIBXSLT_PLUGINS_PATH is %s\n", ext_directory);
 #endif
 
-    if (NULL == ext_directory)
-        ext_directory = BAD_CAST LIBXSLT_DEFAULT_PLUGINS_PATH();
-    if (NULL == ext_directory)
-        return (-1);
-
     /* build the module filename, and confirm the module exists */
     xmlStrPrintf((xmlChar *) module_filename, sizeof(module_filename),
                  BAD_CAST "%s/%s%s",