Remove last use of uip.eof()

Value of uip.eof() should not be trusted.
input like "go infinite searchmoves " (note space in the end of line)
causes problems.

Check the return value of (uip >> token) instead

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

src/uci.cpp

@@ -292,11 +292,9 @@ namespace {
         else if (token == "searchmoves")
         {
             int numOfMoves = 0;
-            while (!uip.eof())
-            {
-                uip >> token;
+            while (uip >> token)
                 searchMoves[numOfMoves++] = move_from_string(RootPosition, token);
-            }
+
             searchMoves[numOfMoves] = MOVE_NONE;
         }
     }