Fix default variable name
Fix default variable name

nickmain/blockly,groklearning/blockly,rachel-fenichel/blockly,trodi/blockly,google/blockly,mark-friedman/blockly,trodi/blockly,mark-friedman/blockly,groklearning/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,picklesrus/blockly,mark-friedman/blockly,google/blockly,trinketapp/blockly,trinketapp/blockly,rachel-fenichel/blockly,twodee/blockly,google/blockly,mark-friedman/blockly,nickmain/blockly,google/blockly,nickmain/blockly,twodee/blockly,nickmain/blockly,nickmain/blockly,trodi/blockly,twodee/blockly,joshlory/blockly,groklearning/blockly,jstnhuang/blockly,rachel-fenichel/blockly,joshlory/blockly,jstnhuang/blockly,twodee/blockly,google/blockly,picklesrus/blockly,trinketapp/blockly,twodee/blockly,mark-friedman/blockly,google/blockly,picklesrus/blockly,trinketapp/blockly,joshlory/blockly,jstnhuang/blockly,trodi/blockly,mark-friedman/blockly,rachel-fenichel/blockly,nickmain/blockly,google/blockly,rachel-fenichel/blockly,groklearning/blockly,jstnhuang/blockly,twodee/blockly