Set LSNTime to 100 ms

This is a timeout compatible with very short TC of 5 sec/game.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

src/search.cpp

@@ -236,7 +236,7 @@ namespace {
 
   // Last seconds noise filtering (LSN)
   const bool UseLSNFiltering = true;
-  const int LSNTime = 4000; // In milliseconds
+  const int LSNTime = 100; // In milliseconds
   const Value LSNValue = value_from_centipawns(200);
   bool loseOnTime = false;