Add warning for default case in canConnectToPrevious_
Add warning for default case in canConnectToPrevious_

rachel-fenichel/blockly,google/blockly,mark-friedman/blockly,google/blockly,google/blockly,rachel-fenichel/blockly,google/blockly,twodee/blockly,twodee/blockly,twodee/blockly,mark-friedman/blockly,nickmain/blockly,picklesrus/blockly,twodee/blockly,google/blockly,nickmain/blockly,rachel-fenichel/blockly,joshlory/blockly,joshlory/blockly,joshlory/blockly,nickmain/blockly,rachel-fenichel/blockly,mark-friedman/blockly,google/blockly,nickmain/blockly,twodee/blockly,rachel-fenichel/blockly,picklesrus/blockly,mark-friedman/blockly,google/blockly,rachel-fenichel/blockly,nickmain/blockly,rachel-fenichel/blockly,nickmain/blockly,mark-friedman/blockly,mark-friedman/blockly,twodee/blockly,picklesrus/blockly