Remove 'observed variable is a reference with refcount = 1' check
Remove 'observed variable is a reference with refcount = 1' check

PDO (tested on PHP 5.5.4) returns objects which do have `isref`
flag set and `refcount` set to 1.

karakurihiden/zephir,gsouf/zephir,sergeyklay/zephir,fezfez/zephir,steffengy/zephir,steffengy/zephir,karakurihiden/zephir,sergeyklay/zephir,vpg/zephir,dreamsxin/zephir,cesarmarinhorj/zephir,patrick-zippenfenig/zephir,karakurihiden/zephir,steffengy/zephir,phalcon/zephir,KorsaR-ZN/zephir,phalcon/zephir,cesarmarinhorj/zephir,zephir-lang/zephir,patrick-zippenfenig/zephir,sjinks/zephir,fezfez/zephir,phalcon/zephir,carlmcdade/zephir,aaam/zephir,gsouf/zephir,patrick-zippenfenig/zephir,steffengy/zephir,carlmcdade/zephir,carlmcdade/zephir,joeyhub/zephir,karakurihiden/zephir,aaam/zephir,KorsaR-ZN/zephir,fezfez/zephir,gsouf/zephir,aaam/zephir,sergeyklay/zephir,sjinks/zephir,janusnic/zephir,carlmcdade/zephir,gsouf/zephir,carlmcdade/zephir,cesarmarinhorj/zephir,zephir-lang/zephir,ovr/zephir,cesarmarinhorj/zephir,carlmcdade/zephir,zephir-lang/zephir,sergeyklay/zephir,dreamsxin/zephir,ovr/zephir,aaam/zephir,janusnic/zephir,patrick-zippenfenig/zephir,ovr/zephir,janusnic/zephir,vpg/zephir,gsouf/zephir,dreamsxin/zephir,phalcon/zephir,ovr/zephir,sjinks/zephir,janusnic/zephir,janusnic/zephir,karakurihiden/zephir,joeyhub/zephir,dreamsxin/zephir,fezfez/zephir,KorsaR-ZN/zephir,sergeyklay/zephir,aaam/zephir,KorsaR-ZN/zephir,dreamsxin/zephir,joeyhub/zephir,fezfez/zephir,janusnic/zephir,cesarmarinhorj/zephir,aaam/zephir,karakurihiden/zephir,steffengy/zephir,KorsaR-ZN/zephir,joeyhub/zephir,sjinks/zephir,steffengy/zephir,sergeyklay/zephir,patrick-zippenfenig/zephir,cesarmarinhorj/zephir,zephir-lang/zephir,sjinks/zephir,vpg/zephir,joeyhub/zephir,vpg/zephir,patrick-zippenfenig/zephir,zephir-lang/zephir,gsouf/zephir,joeyhub/zephir,phalcon/zephir,dreamsxin/zephir,vpg/zephir,KorsaR-ZN/zephir,phalcon/zephir,fezfez/zephir,sjinks/zephir,vpg/zephir