msvcrt: Add support for sprintf_s.

dlls/msvcrt/msvcrt.spec

@@ -747,6 +747,7 @@
 @ cdecl sin(double) MSVCRT_sin
 @ cdecl sinh(double) MSVCRT_sinh
 @ varargs sprintf(ptr str) MSVCRT_sprintf
+@ varargs sprintf_s(ptr long str) MSVCRT_sprintf_s
 @ cdecl sqrt(double) MSVCRT_sqrt
 @ cdecl srand(long) MSVCRT_srand
 @ varargs sscanf(str str) MSVCRT_sscanf

dlls/msvcrt/wcs.c

@@ -902,6 +902,20 @@ int CDECL MSVCRT_sprintf( char *str, const char *format, ... )
 }
 
 /*********************************************************************
+ *		sprintf_s (MSVCRT.@)
+ */
+int CDECL MSVCRT_sprintf_s( char *str, MSVCRT_size_t num, const char *format, ... )
+{
+    __ms_va_list ap;
+    int r;
+
+    __ms_va_start( ap, format );
+    r = MSVCRT_vsnprintf( str, num, format, ap );
+    __ms_va_end( ap );
+    return r;
+}
+
+/*********************************************************************
  *		swprintf (MSVCRT.@)
  */
 int CDECL MSVCRT_swprintf( MSVCRT_wchar_t *str, const MSVCRT_wchar_t *format, ... )