Description:
------------
while use valgrind exam PHP 5.3,  it complain of invalid reading.


Test script:
---------------
<?php
echo 2;
?>

#run 
$USE_ZEND_ALLOC=0 valgrind php53 above.php

Expected result:
----------------
no complaint

Actual result:
--------------
==11759== Memcheck, a memory error detector
==11759== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==11759== Using Valgrind-3.5.0 and LibVEX; rerun with -h for copyright info
==11759== Command: php above.php
==11759== 
==11759== Invalid read of size 1
==11759==    at 0x8F4D95: lex_scan (zend_language_scanner.c:1028)
==11759==    by 0x932C91: zendlex (zend_compile.c:4975)
==11759==    by 0x8EA7E3: zendparse (zend_language_parser.c:2948)
==11759==    by 0x8F240B: compile_file (zend_language_scanner.l:364)
==11759==    by 0x6CA931: phar_compile_file (phar.c:3393)
==11759==    by 0x94DD0E: zend_execute_scripts (zend.c:1228)
==11759==    by 0x8B5E33: php_execute_script (main.c:2308)
==11759==    by 0xA430C4: main (php_cli.c:1184)
==11759==  Address 0x87ec132 is 0 bytes after a block of size 18 alloc'd
==11759==    at 0x490514E: malloc (vg_replace_malloc.c:195)
==11759==    by 0x91DC2D: _emalloc (zend_alloc.c:2348)
==11759==    by 0x8F1E36: open_file_for_scanning (zend_language_scanner.l:288)
==11759==    by 0x8F2343: compile_file (zend_language_scanner.l:352)
==11759==    by 0x6CA931: phar_compile_file (phar.c:3393)
==11759==    by 0x94DD0E: zend_execute_scripts (zend.c:1228)
==11759==    by 0x8B5E33: php_execute_script (main.c:2308)
==11759==    by 0xA430C4: main (php_cli.c:1184)
==11759== 
2==11759== 
==11759== HEAP SUMMARY:
==11759==     in use at exit: 46,688 bytes in 1,586 blocks
==11759==   total heap usage: 29,304 allocs, 27,718 frees, 4,549,300 bytes 
allocated
==11759== 
==11759== LEAK SUMMARY:
==11759==    definitely lost: 0 bytes in 0 blocks
==11759==    indirectly lost: 0 bytes in 0 blocks
==11759==      possibly lost: 0 bytes in 0 blocks
==11759==    still reachable: 46,688 bytes in 1,586 blocks
==11759==         suppressed: 0 bytes in 0 blocks
==11759== Rerun with --leak-check=full to see details of leaked memory
==11759== 
==11759== For counts of detected and suppressed errors, rerun with: -v
==11759== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 4 from 4)