fix center button disappear bug

Tangdixi · Tangdixi · commit ad674de06c6b · 2014-11-19T10:21:46.000+08:00
diff --git a/DCPathButton/Classes/DCPathButton.m b/DCPathButton/Classes/DCPathButton.m
@@ -91,6 +91,7 @@ - (void)configureViewsLayout
     // Default set the foldCenter as the DCPathButton's center
     //
     self.center = self.foldCenter;
+    self.dcButtonCenter = self.center;
     
     // Configure center button
     //
