safe types for the unofficial tests

Author: georges-hatem

entries/ghatem-fpc/src/OneBRC-largerec.lpr

@@ -41,7 +41,7 @@   TOneBRCApp = class(TCustomApplication)
   TStationData = packed record
     Min: SmallInt;
     Max: SmallInt;
-    Count: UInt16; // will fail on 400 stations / 5B row tests, due to overflow
+    Count: UInt32;
     Sum: Integer;
   end;
   PStationData = ^TStationData;