Do not wait when AbortSearch is set

It means we have already received "stop" or "quit" commands.

This fixes an hang in tactical test in Fritz GUI. Bug
introduced by previous bug fix :-(

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

src/search.cpp

@@ -850,7 +850,7 @@ namespace {
 
     // If we are pondering or in infinite search, we shouldn't print the
     // best move before we are told to do so.
-    if (PonderSearch || InfiniteSearch)
+    if (!AbortSearch && (PonderSearch || InfiniteSearch))
         wait_for_stop_or_ponderhit();
     else
         // Print final search statistics