msvcrt: Added _iswalpha_l implementation.

dlls/msvcrt/msvcrt.spec

@@ -554,7 +554,7 @@
 # stub _isspace_l
 # stub _isupper_l
 # stub _iswalnum_l
-# stub _iswalpha_l
+@ cdecl _iswalpha_l(long ptr) MSVCRT__iswalpha_l
 # stub _iswcntrl_l
 # stub _iswctype_l
 # stub _iswdigit_l

dlls/msvcrt/wcs.c

@@ -1023,6 +1023,14 @@ INT CDECL MSVCRT_iswalpha( MSVCRT_wchar_t wc )
 }
 
 /*********************************************************************
+ *              iswalpha_l (MSVCRT.@)
+ */
+INT CDECL MSVCRT__iswalpha_l( MSVCRT_wchar_t wc, MSVCRT__locale_t locale )
+{
+    return isalphaW( wc );
+}
+
+/*********************************************************************
  *		iswcntrl (MSVCRT.@)
  */
 INT CDECL MSVCRT_iswcntrl( MSVCRT_wchar_t wc )