initialize otherwise-uninitialized qid.type

Reference: /n/sources/patch/applied/kfs
Date: Wed Sep 26 18:43:24 CES 2007
Signed-off-by: rsc@swtch.com

--- /sys/src/cmd/disk/kfs/sub.c	Wed Sep 26 18:43:10 2007
+++ /sys/src/cmd/disk/kfs/sub.c	Wed Sep 26 18:43:10 2007
@@ -356,6 +356,7 @@
 	sb->qidgen++;
 	qid.path = sb->qidgen;
 	qid.vers = 0;
+	qid.type = 0;
 	putbuf(p);
 	return qid;
 }