Fix g4 ingame trade exception

Resolves the Internal Error exception where the EncounterMatch was not
overwritten; in the case of some encounters, an encounterslot[] was
provided -> invalid cast
#1095

PKHeX/Legality/Checks.cs

@@ -1063,8 +1063,8 @@ private CheckResult verifyEncounterG4Transfer()
             var trade = Legal.getValidIngameTrade(pkm);
             if (trade != null)
             {
-                Gen4Result = verifyEncounterTrade();
                 EncounterMatch = trade;
+                Gen4Result = verifyEncounterTrade();
             }
 
             verifyTransferLegalityG4();