Fixed bug #65947 (basename is no more working after fgetcsv in certain situation)

previous codes: "#define php_mblen(ptr, len) ((ptr) == NULL ? mbsinit(&BG(mblen_state)):
(int)mbrlen(ptr, len, &BG(mblen_state)))#

it use mbsinit there, seems try to initialize the mblen_state, but:
"This function does not change the state identified by ps. Typical ways
to make the state pointed by ps an initial state are:

memset (ps,0,sizeof(*ps));  // ps points to zero-valued object
"
http://www.cplusplus.com/reference/cwchar/mbsinit/?kw=mbsinit

NEWS

@@ -2,6 +2,10 @@ PHP                                                                        NEWS
 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 ?? ??? 2013, PHP 5.4.23
 
+- Core:
+  . Fixed bug #65947 (basename is no more working after fgetcsv in certain 
+    situation). (Laruence)
+
 - MySQLi:
   . Fixed bug #66043 (Segfault calling bind_param() on mysqli). (Laruence)
 

ext/standard/php_string.h

@@ -156,7 +156,7 @@ PHPAPI char *php_strerror(int errnum);
 # define php_mblen(ptr, len) 1
 #else
 # if defined(_REENTRANT) && defined(HAVE_MBRLEN) && defined(HAVE_MBSTATE_T)
-#  define php_mblen(ptr, len) ((ptr) == NULL ? mbsinit(&BG(mblen_state)): (int)mbrlen(ptr, len, &BG(mblen_state)))
+#  define php_mblen(ptr, len) ((ptr) == NULL ? memset(&BG(mblen_state), 0, sizeof(BG(mblen_state))): (int)mbrlen(ptr, len, &BG(mblen_state)))
 # else
 #  define php_mblen(ptr, len) mblen(ptr, len)
 # endif

ext/standard/tests/strings/bug65947.phpt

@@ -0,0 +1,17 @@
+--TEST--
+Bug #65947 (basename is no more working after fgetcsv in certain situation)
+--SKIPIF--
+<?php if (!PHP_ZTS) { print "skip only for zts build"; }
+--FILE--
+<?php
+$filename = 'test.toto';
+// é in ISO-8859-1
+$csv = base64_decode('6Q==');
+$adata = str_getcsv($csv,";");
+$b2 = basename($filename);
+if ($filename != $b2) 
+	print "BUG";
+else 
+	print "OKEY";
+--EXPECTF--	
+OKEY