Description:
------------
as you can see in zend_compile.c
        opline->opcode = ZEND_INIT_NS_FCALL_BY_NAME;
ZEND_INIT_NS_FCALL_BY_NAME's op1 is initialized, so is op2
.........
        opline->opcode = ZEND_OP_DATA;
ZEND_OP_DATA's op1 is initialized here but op2 is not

it may not cause problem in zend executor but may in opcode optimizers/cachers

suggested fix:
Index: zend_compile.c
===================================================================
RCS file: /repository/ZendEngine2/zend_compile.c,v
retrieving revision 1.647.2.27.2.41.2.32
diff -u -r1.647.2.27.2.41.2.32 zend_compile.c
--- zend_compile.c  27 Dec 2007 13:52:05 -0000  1.647.2.27.2.41.2.32
+++ zend_compile.c  28 Dec 2007 08:56:41 -0000
@@ -1504,6 +1504,7 @@
        Z_TYPE(opline->op1.u.constant) = IS_STRING;
        Z_STRLEN(opline->op1.u.constant) = Z_STRLEN(function_name->u.constant) - prefix_len;
        Z_STRVAL(opline->op1.u.constant) = zend_str_tolower_dup(Z_STRVAL(function_name->u.constant) + prefix_len, Z_STRLEN(opline->op1.u.constant));
+       SET_UNUSED(opline->op2);
        opline->extended_value = zend_hash_func(Z_STRVAL(opline->op1.u.constant), Z_STRLEN(opline->op1.u.constant) + 1);
    } else {
        opline->opcode = ZEND_INIT_FCALL_BY_NAME;