From 1495674884a5567d61699fbcd5b73ce10cff59fd Mon Sep 17 00:00:00 2001
From: Daniel Hedlund <daniel@digitree.org>
Date: Mon, 16 Dec 2013 10:43:40 -0800
Subject: [PATCH] Truncate output files created in store_png

Use io::Truncate instead of io::Open for file mode.
---
 lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib.rs b/lib.rs
index 42105b4..d59f80a 100644
--- a/lib.rs
+++ b/lib.rs
@@ -187,7 +187,7 @@ pub extern fn flush_data(png_ptr: *ffi::png_struct) {
 
 #[fixed_stack_segment]
 pub fn store_png(img: &Image, path: &Path) -> Result<(),~str> {
-    let mut file = match File::open_mode(path, io::Open, io::Write) {
+    let mut file = match File::open_mode(path, io::Truncate, io::Write) {
         Some(file) => file,
         None => return Err(~"could not open file")
     };