Fix fgetcsv() to correctly support international characters

# note: mblen() is not a mbstring function, but is part of the ANSI standard
# which is even supported by Microsoft's libc.

ext/standard/basic_functions.h

@@ -24,6 +24,10 @@
 
 #include <sys/stat.h>
 
+#ifdef HAVE_WCHAR_H
+#include <wchar.h>
+#endif
+
 #include "zend_highlight.h"
 
 #include "url_scanner.h"
@@ -199,6 +203,11 @@ typedef struct _php_basic_globals {
 #endif
 
 	HashTable *user_filter_map;
+
+	/* file.c */
+#if defined(_REENTRANT) && defined(HAVE_MBRLEN) && defined(HAVE_MBSTATE_T)
+	mbstate_t mblen_state;
+#endif
 } php_basic_globals;
 
 #ifdef ZTS