sdjournal: un-break errint->err replacement
sdjournal: un-break errint->err replacement

7f0723f2757beb369312e795c56cb681a928d7c7 inadvertently broke the build
by re-using a variable; this fixes that.

faiq/go-systemd,endocode/go-systemd,jareksm/go-systemd,faiq/go-systemd,brnv/go-systemd,jareksm/go-systemd,glerchundi/go-systemd,coreos/go-systemd,endocode/go-systemd,coreos/go-systemd,brnv/go-systemd,jonboulle/go-systemd,jonboulle/go-systemd,glerchundi/go-systemd