Patch: Camel stream filter waits properly for slow streams

[José Dapena Paz <jdapena igalia com>]

	Hi,

	This patch for tinymail modifies a bit the implementation of do_write
method in camel_stream_filter, to make it not fail simply because the
stream is slow. In my case I'm getting problems writting to a bluetooth
stream, as it sometimes writes less than the full buffer, and then the
stream filter returns -1.

	Anyway, it seems that my code adds an active wait. How could I fix
this? Any safe idea?

	Changelog entry would be:
* libtinymail-camel/camel-lite/camel/camel-stream-filter.c:
	* (do_write): if the camel_stream_write call does not write the
	  full buffer but it's not due to an error, then loop to go on 
	  writing the stream.

-- 
José Dapena Paz <jdapena igalia com>
Igalia

Index: libtinymail-camel/camel-lite/camel/camel-stream-filter.c
===================================================================
--- libtinymail-camel/camel-lite/camel/camel-stream-filter.c	(revision 3671)
+++ libtinymail-camel/camel-lite/camel/camel-stream-filter.c	(working copy)
@@ -290,6 +290,7 @@
 	struct _filter *f;
 	size_t presize, len, left = n;
 	char *buffer, realbuffer[READ_SIZE+READ_PAD];
+	size_t written = 0;
 
 	p->last_was_read = FALSE;
 
@@ -321,8 +322,13 @@
 			f = f->next;
 		}
 
-		if (camel_stream_write(filter->source, buffer, len) != len)
-			return -1;
+		for (written = 0; written < len;) {
+			size_t just_written;
+			just_written = camel_stream_write (filter->source, buffer + written, len - written);
+			if (just_written == -1)
+				return -1;
+			written += just_written;
+		}
 	}
 
 	g_check(p->realbuffer);