if krb5_get_default_config_files() returns success and

an empty list, then get_profile_file() will attempt
to dereference a null pointer.  check for the empty
list and treat it as failure.

Patch by Jeffrey Altman.

From: Alexey Melnikov <alexey.melnikov@isode.com>

leashw32: get_profile_file

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25250 dc483132-0cff-0310-8789-dd5450dbe970

src/windows/leashdll/lshfunc.c

@@ -1553,7 +1553,7 @@ get_profile_file(LPSTR confname, UINT szConfname)
 {
     char **configFile = NULL;
     if (hKrb5) {
-        if (pkrb5_get_default_config_files(&configFile))
+        if (pkrb5_get_default_config_files(&configFile) || !configFile[0])
         {
             GetWindowsDirectory(confname,szConfname);
             confname[szConfname-1] = '\0';