[CIFS] Fix path name conversion for long filenames when mapchars mount
option was specified at mount time.

Signed-off-by: Steve French (sfrench@us.ibm.com)
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 072b4ee..20ae415 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -611,6 +611,7 @@
 		src_char = source[i];
 		switch (src_char) {
 			case 0:
+				target[j] = 0;
 				goto ctoUCS_out;
 			case ':':
 				target[j] = cpu_to_le16(UNI_COLON);