[CIFS] fix prepath conversion when server supports posix paths

Jeff Layton that we were converting \ to / in the posix path case which is
not always right (depends on what the old delim was).

CC: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/connect.c

@@ -1802,12 +1802,18 @@ static void
 convert_delimiter(char *path, char delim)
 {
 	int i;
+	char old_delim;
 
 	if (path == NULL)
 		return;
 
+	if (delim == '/') 
+		old_delim = '\\';
+	else
+		old_delim = '/';
+
 	for (i = 0; path[i] != '\0'; i++) {
-		if ((path[i] == '/') || (path[i] == '\\'))
+		if (path[i] == old_delim)
 			path[i] = delim;
 	}
 }