core: update: Fix winstore detection

(cherry picked from commit c15e2691)
Signed-off-by: Hugo Beauzée-Luyssen <hugo@beauzee.fr>

src/misc/update.c

@@ -728,7 +728,7 @@ static void* update_DownloadReal( void *obj )
                                            psz_msg );
     if(answer == 1)
     {
-#ifndef VLC_WINSTORE_APP
+#if !VLC_WINSTORE_APP
         wchar_t psz_wdestfile[MAX_PATH];
         MultiByteToWideChar( CP_UTF8, 0, psz_destfile, -1, psz_wdestfile, MAX_PATH );
         answer = (int)ShellExecuteW( NULL, L"open", psz_wdestfile, NULL, NULL, SW_SHOW);