Initialize calendar_long variable

As reported by cmb, this results a VC runtime warning. I don't
believe there's a problem here, as we only use calendar_long if
both calendar_is_null and calendar_obj are not set, but it doesn't
hurt to initialize it either...

Author: nikic

ext/intl/dateformat/dateformat_create.cpp

@@ -54,7 +54,7 @@ static zend_result datefmt_ctor(INTERNAL_FUNCTION_PARAMETERS)
 	zend_long	date_type	= 0;
 	zend_long	time_type	= 0;
 	zend_object *calendar_obj = NULL;
-	zend_long calendar_long;
+	zend_long calendar_long = 0;
 	zend_bool calendar_is_null = 1;
 	Calendar *cal = NULL;
 	zend_long	calendar_type;