mountd: fix path comparison for v4 crossmnt

From: J. Bruce Fields <bfields@citi.umich.edu>

This was obviously wrong, since path[strlen(path)] == '\0'
should always be true.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Steve Dickson <steved@redhat.com>
---
 utils/mountd/cache.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/utils/mountd/cache.c b/utils/mountd/cache.c
index 721d550..cf094f6 100644
--- a/utils/mountd/cache.c
+++ b/utils/mountd/cache.c
@@ -622,7 +622,7 @@ static int is_subdirectory(char *subpath, char *path)
 	int l = strlen(path);
 
 	return strcmp(subpath, path) == 0
-		|| (strncmp(subpath, path, l) == 0 && path[l] == '/'
+		|| (strncmp(subpath, path, l) == 0 && subpath[l] == '/'
 		    && is_mountpoint(path));
 }