Fix JMPZ, JMPZNZ_EX chain optimization

Fix JMPZ, JMPZNZ_EX chain optimization

The result_type was not copied, resulting in a corrupted JMPZ_EX.
Fix can be verified by inspecting the opcodes of the following
function (it should not contain any _EX opcodes):

function test() {
    if ($a && $b) {
        echo "a";
    }

    if ($b || $c || $d) {
        echo "b";
    }
}

Conflicts:
	ext/opcache/Optimizer/block_pass.c