[gnome-boxes] downloader: Handle downloads of unknown size

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 612d7d90344ddf8b996041757b49eda359c468a7
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Mon Oct 13 18:48:09 2014 +0100

    downloader: Handle downloads of unknown size
    
    Currently if size of file being downloaded is unknown, we download the
    bytes but just ignore the bytes. This patch fixes this case by writing
    the downloaded bytes to the file but just not reporting progress if size
    is unknown.

 src/downloader.vala |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/src/downloader.vala b/src/downloader.vala
index 191ee26..d965815 100644
--- a/src/downloader.vala
+++ b/src/downloader.vala
@@ -141,16 +141,15 @@ private class Boxes.Downloader : GLib.Object {
         int64 current_num_bytes = 0;
         // FIXME: Reduce lambda nesting by splitting out downloading to Download class
         msg.got_chunk.connect ((msg, chunk) => {
-            if (total_num_bytes <= 0)
-                return;
-
             current_num_bytes += chunk.length;
             try {
                 // Write synchronously as we have no control over order of async
                 // calls and we'll end up writing bytes out in wrong order. Besides
                 // we are writing small chunks so it wouldn't really block the UI.
                 cached_file_stream.write (chunk.data);
-                download.progress.progress = (double) current_num_bytes / total_num_bytes;
+                if (total_num_bytes > 0)
+                    // Don't report progress if there is no way to determine it
+                    download.progress.progress = (double) current_num_bytes / total_num_bytes;
             } catch (GLib.Error e) {
                 err = e;
                 session.cancel_message (msg, Soup.Status.CANCELLED);