Fix crash

app/src/main/java/net/pokeranalytics/android/model/realm/handhistory/HandHistory.kt

@@ -754,9 +754,13 @@ open class HandHistory : RealmObject(), Deletable, RowRepresentable, Filterable,
 			return cards.filter { it.isSuitWildCard }
 		}
 
-	val largestWonPot: WonPot?
+	private val largestWonPot: WonPot?
 		get() {
-			return this.winnerPots.maxBy { it.amount }
+			return if (this.winnerPots.isNotEmpty()) { // needed, otherwise maxBy crashes
+				this.winnerPots.maxBy { it.amount }
+			} else {
+				null
+			}
 		}
 
 }