have dirread pass the allocation buck on to caller

Notes:
Sat Jan 3 19:39:02 EST 2009 jmk
    
    In general, a patch should
    
    1) compile without error or warning;
    2) if it's a library routine then
    	the APE source should be checked
    	to see if it applies there, and
    	a 'mk all' should be done in /sys/src
    	to ensure all uses are correct.


Reference: /n/sources/patch/sorry/dirreadmt
Date: Fri Jan  2 04:16:19 CET 2009
Signed-off-by: quanstro@quanstro.net
Reviewed-by: geoff

--- /sys/src/libc/9sys/dirread.c	Fri Jan  2 04:16:15 2009
+++ /sys/src/libc/9sys/dirread.c	Fri Jan  2 04:16:14 2009
@@ -65,6 +65,8 @@
 	if(ts >= 0)
 		ts = dirpackage(buf, ts, d);
 	free(buf);
+	if(*d != nil)
+		setmalloctag(*t, getcallerpc(&fd));
 	return ts;
 }
 
@@ -91,6 +93,8 @@
 	if(ts >= 0)
 		ts = dirpackage(buf, ts, d);
 	free(buf);
+	if(*d != nil)
+		setmalloctag(*t, getcallerpc(&fd));
 	if(ts == 0 && n < 0)
 		return -1;
 	return ts;