msvcrt: Add _scwprintf implementation.

dlls/msvcr100/msvcr100.spec

@@ -1012,7 +1012,7 @@
 @ stub _scprintf_l
 @ stub _scprintf_p
 @ stub _scprintf_p_l
-@ stub _scwprintf
+@ varargs _scwprintf(wstr) msvcrt._scwprintf
 @ stub _scwprintf_l
 @ stub _scwprintf_p
 @ stub _scwprintf_p_l

dlls/msvcr80/msvcr80.spec

@@ -857,7 +857,7 @@
 @ stub _scprintf_l
 @ stub _scprintf_p
 @ stub _scprintf_p_l
-@ stub _scwprintf
+@ varargs _scwprintf(wstr) msvcrt._scwprintf
 @ stub _scwprintf_l
 @ stub _scwprintf_p
 @ stub _scwprintf_p_l

dlls/msvcr90/msvcr90.spec

@@ -843,7 +843,7 @@
 @ stub _scprintf_l
 @ stub _scprintf_p
 @ stub _scprintf_p_l
-@ stub _scwprintf
+@ varargs _scwprintf(wstr) msvcrt._scwprintf
 @ stub _scwprintf_l
 @ stub _scwprintf_p
 @ stub _scwprintf_p_l

dlls/msvcrt/msvcrt.spec

@@ -801,7 +801,7 @@
 # stub _scprintf
 # stub _scprintf_l
 # stub _scprintf_p_l
-# stub _scwprintf
+@ varargs _scwprintf(wstr) MSVCRT__scwprintf
 # stub _scwprintf_l
 # stub _scwprintf_p_l
 @ cdecl _searchenv(str str ptr)

dlls/msvcrt/wcs.c

@@ -1247,6 +1247,20 @@ int CDECL MSVCRT_sprintf_s( char *str, MSVCRT_size_t num, const char *format, ..
 }
 
 /*********************************************************************
+ *		_scwprintf (MSVCRT.@)
+ */
+int CDECL MSVCRT__scwprintf( const MSVCRT_wchar_t *format, ... )
+{
+    __ms_va_list ap;
+    int r;
+
+    __ms_va_start( ap, format );
+    r = MSVCRT_vsnwprintf( NULL, INT_MAX, format, ap );
+    __ms_va_end( ap );
+    return r;
+}
+
+/*********************************************************************
  *		swprintf (MSVCRT.@)
  */
 int CDECL MSVCRT_swprintf( MSVCRT_wchar_t *str, const MSVCRT_wchar_t *format, ... )