register a complaint against a specific device when encountering a partition i/o
error

Reference: /n/atom/patch/applied/fspartfailmsg
Date: Mon Apr 14 07:18:33 CES 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/fs/dev/part.c	Mon Apr 14 07:18:07 2014
+++ /sys/src/fs/dev/part.c	Mon Apr 14 07:18:08 2014
@@ -477,7 +477,7 @@
 {
 	if(b < d->part.size)
 		return devread(d->part.d, d->part.base+b, c);
-	print("partread %llud %llud\n", (Wideoff)b, d->part.size);
+	print("partread %Z %llud %llud\n", d, (Wideoff)b, d->part.size);
 	return 1;
 }
 
@@ -486,7 +486,7 @@
 {
 	if(b < d->part.size)
 		return devwrite(d->part.d, d->part.base+b, c);
-	print("partwrite %llud %llud\n", (Wideoff)b, d->part.size);
+	print("partwrite %Z %llud %llud\n", d, (Wideoff)b, d->part.size);
 	return 1;
 }