smb: use utf8_open (fix #2922)

(cherry picked from commit 22507d75 and
e83b4259)
Signed-off-by: Rémi Duraffort <ivoire@videolan.org>

modules/access/smb.c

@@ -31,6 +31,7 @@
 #endif
 
 #include <vlc_common.h>
+#include <vlc_charset.h>
 #include <vlc_plugin.h>
 #include <vlc_access.h>
 
@@ -42,7 +43,7 @@
 #       include <sys/stat.h>
 #   endif
 #   include <io.h>
-#   define smbc_open(a,b,c) open(a,b,c)
+#   define smbc_open(a,b,c) utf8_open(a,b,c)
 #   define stat _stati64
 #   define smbc_fstat(a,b) _fstati64(a,b)
 #   define smbc_read read