Merge pull request #277 from puffnfresh/master

Workaround changed API in Chart-cairo 1.3

ihaskell-display/ihaskell-charts/IHaskell/Display/Charts.hs

@@ -1,4 +1,4 @@
-{-# LANGUAGE NoImplicitPrelude #-}
+{-# LANGUAGE NoImplicitPrelude, CPP #-}
 module IHaskell.Display.Charts () where
 
 import ClassyPrelude
@@ -35,7 +35,13 @@ chartData renderable format = do
   -- Write the PNG image.
   let filename = ".ihaskell-chart.png"
       opts = def{_fo_format = format, _fo_size = (width, height)}
-  renderableToFile opts renderable filename
+      toFile = renderableToFile opts
+
+#if MIN_VERSION_Chart_cairo(1,3,0)
+  toFile filename renderable
+#else
+  toFile renderable filename
+#endif
 
   -- Convert to base64.
   imgData <- readFile $ fpFromString filename