[weiden] 17039: fail as documented when the pointer to the buffer equals the pointer to the string to be converted in MultiByteToWideChar and WideCharToMultiByte

fail as documented when the pointer to the buffer equals the pointer to
the string to be converted in MultiByteToWideChar and
WideCharToMultiByte
Modified: trunk/reactos/lib/kernel32/misc/nls.c
  _____
Modified: trunk/reactos/lib/kernel32/misc/nls.c
--- trunk/reactos/lib/kernel32/misc/nls.c       2005-08-03 22:49:47 UTC
(rev 17038)
+++ trunk/reactos/lib/kernel32/misc/nls.c       2005-08-03 23:07:10 UTC
(rev 17039)
@@ -745,7 +745,8 @@
 {
    /* Check the parameters. */
    if (MultiByteString == NULL ||
-       (WideCharString == NULL && WideCharCount > 0))
+       (WideCharString == NULL && WideCharCount > 0) ||
+       (PVOID)MultiByteString == (PVOID)WideCharString)
    {
       SetLastError(ERROR_INVALID_PARAMETER);
       return 0;
@@ -823,7 +824,8 @@
 {
    /* Check the parameters. */
    if (WideCharString == NULL ||
-       (MultiByteString == NULL && MultiByteCount > 0))
+       (MultiByteString == NULL && MultiByteCount > 0) ||
+       (PVOID)WideCharString == (PVOID)MultiByteString)
    {
       SetLastError(ERROR_INVALID_PARAMETER);
       return 0;