Fix error undefined bug.
Fix error undefined bug.

magul/streetmix,kodujdlapolski/streetmix,kodujdlapolski/streetmix,macGRID-SRN/streetmix,codeforamerica/streetmix,CodeForBrazil/streetmix,CodeForBrazil/streetmix,codeforamerica/streetmix,macGRID-SRN/streetmix,codeforamerica/streetmix,magul/streetmix,CodeForBrazil/streetmix,macGRID-SRN/streetmix,kodujdlapolski/streetmix,magul/streetmix