Description:
------------
The function addcslashes doesn't free memory when its first argument is longer than 4


CONFIGURE LINE:
./configure --prefix=/opt/lampp --with-apxs2=/opt/lampp/bin/apxs --with-config-file-path=/opt/lampp/etc --with-mysql=/opt/lampp --enable-inline-optimization --disable-debug --enable-bcmath --enable-calendar --enable-ctype --enable-dbase --enable-discard-path --enable-exif --enable-filepro --enable-force-cgi-redirect --enable-ftp --enable-gd-imgstrttf --enable-gd-native-ttf --with-ttf --enable-magic-quotes --enable-memory-limit --enable-shmop --enable-sigchild --enable-sysvsem --enable-sysvshm --enable-track-vars --enable-trans-sid --enable-wddx --enable-yp --with-ftp --with-gdbm=/opt/lampp --with-jpeg-dir=/opt/lampp --with-png-dir=/opt/lampp --with-freetype-dir=/opt/lampp --without-xpm --with-zlib=yes --with-zlib-dir=/opt/lampp --with-openssl=/opt/lampp --with-expat-dir=/opt/lampp --enable-xslt=/opt/lampp --with-xsl=/opt/lampp --with-dom=/opt/lampp --with-ldap=/opt/lampp --with-ncurses=/opt/lampp --with-gd --with-imap-dir=/opt/lampp --with-imap-ssl --with-imap=/opt/lampp --with-gettext=/opt/lampp --with-mssql=/opt/lampp --with-sybase=/opt/lampp --with-interbase=shared,/opt/interbase --with-mysql-sock=/opt/lampp/var/mysql/mysql.sock --with-oci8=shared,instantclient,/opt/lampp/lib/instantclient --with-mcrypt=/opt/lampp --with-mhash=/opt/lampp --enable-sockets --enable-mbstring=all --with-curl=/opt/lampp --enable-mbregex --enable-zend-multibyte --enable-exif --with-bz2=/opt/lampp --with-sqlite=shared,/opt/lampp --with-libxml-dir=/opt/lampp --enable-soap --enable-pcntl --with-mysqli=/opt/lampp/bin/mysql_config --with-mime-magic --with-pgsql=shared,/opt/lampp/postgresql --with-iconv --enable-dio --with-pdo-mysql=/opt/lampp --with-pdo-pgsql=/opt/lampp/postgresql --with-pdo-sqlite --with-ming=shared,/opt/lampp

Reproduce code:
---------------
for($i=0 ; $i<5000 ; ++$i){
	addcslashes("12345","'") ;
	echo memory_get_usage(),"<br>\n" ;
}


Expected result:
----------------
The memory usage should be the same in every iteration.

Actual result:
--------------
The memory usage keeps growing and growing up to a certain maximum which depends on the length of the first argument of addcslashes.