Description:
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Starting with PHP 5.3.0, zend_parse_method_parameters() and zend_parse_method_parameters_ex() check the number of passed arguments not to be 0.
However, zend_parse_method_parameters_ex() passes num_args-1 to RETURN_IF_ZERO_ARGS, yielding immediate function return with return code FAILURE - checking the passed arguments fails incorrectly.

See the 'test script' code for an idea how the problem scenario looks like.
Note: the code for the 'test script' isn't php script code but rather C++ code for a class exposed from a custom php extension.

Test script:
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/* {{{ proto void MySample::__destruct() */
ZEND_METHOD(mysample_class, __destruct)
{
	zval* objid;
#if 1	// fails: zend_parse_method_parameters_ex() returns FAILURE
	if (zend_parse_method_parameters_ex(0, ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "O", &objid, mysample_class_entry) == FAILURE)
		return;
#else	// ... whereas zend_parse_method_parameters() returns SUCCESS
	if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "O", &objid, mysample_class_entry) == FAILURE)
		return;
#endif

	mysample_class* pobj = (mysample_class*) zend_object_store_get_object(objid TSRMLS_CC);
	
	// ...
}
/* }}} */


Expected result:
----------------
zend_parse_method_parameters_ex() should return SUCCESS just as zend_parse_method_parameters() does

Actual result:
--------------
zend_parse_method_parameters_ex() returns FAILURE