From 2e166b1bd8be4f18a98e87dc4387264bbcf7fd3b Mon Sep 17 00:00:00 2001
From: Aaron Daub <aarondaub@Aarons-MacBook-Pro.local>
Date: Mon, 28 Dec 2015 19:41:45 -0800
Subject: [PATCH] Use nil coalescing in ChartDataSet's entryCount (Fixes #631)

The force unwrapping in entryCount caused a crash when yVals was nil. Now entryCount returns 0.
---
 Charts/Classes/Data/ChartDataSet.swift | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Charts/Classes/Data/ChartDataSet.swift b/Charts/Classes/Data/ChartDataSet.swift
index bf44f686b3..1df457bdf2 100644
--- a/Charts/Classes/Data/ChartDataSet.swift
+++ b/Charts/Classes/Data/ChartDataSet.swift
@@ -153,7 +153,7 @@ public class ChartDataSet: NSObject
         return yValueSum / Double(valueCount)
     }
     
-    public var entryCount: Int { return _yVals!.count; }
+    public var entryCount: Int { return _yVals?.count ?? 0 }
     
     public func yValForXIndex(x: Int) -> Double
     {