fix case where file was deleted and directory created in it's stead.

Notes:
Fri Apr 6 10:20:53 EDT 2007 rsc
    I am worried by the change from if to else if in the patch.
    It looks like before, if the file changed you'd get a c line
    and if the metadata changed you'd get an m line,
    and if both changed you'd get both, but now 
    you just get a c line.
    


Reference: /n/sources/patch/saved/updatedb-ftod
Date: Wed Mar  7 22:36:24 CET 2007
Signed-off-by: quanstro@quanstro.net
Reviewed-by: geoff

--- /sys/src/cmd/replica/updatedb.c	Wed Mar  7 22:35:42 2007
+++ /sys/src/cmd/replica/updatedb.c	Wed Mar  7 22:35:39 2007
@@ -77,11 +77,15 @@
 			change = 1;
 		}
 	}else{
-		if((d.mode&DMDIR)==0 && (od.mtime!=d.mtime || od.length!=d.length)){
+		if((od.mode&DMDIR) != (d.mode&DMDIR)){
+			xlog('d', new, &d);
+			xlog('a', new, &d);
+			change = 1;
+		}else if((d.mode&DMDIR)==0 && (od.mtime!=d.mtime || od.length!=d.length)){
 			xlog('c', new, &d);
 			change = 1;
 		}
-		if((!uid&&strcmp(od.uid,d.uid)!=0)
+		else if((!uid&&strcmp(od.uid,d.uid)!=0)
 		|| strcmp(od.gid,d.gid)!=0 
 		|| od.mode!=d.mode){
 			xlog('m', new, &d);