SIG_VALTYPE_ grammar is incorrect

[Will]

I've found another inconsistency with Vector's DBC specification (1.0.5) relating to extended signal information (SIG_VALTYPE_).

The current dbc.g4 specifies:
signalExtendedValueTypeList : EOL+ 'SIG_VALTYPE_' msgId=Integer signalName=ID signalExtendedValueType=Integer ';'

But there's actually an extra colon after the signal name:
signalExtendedValueTypeList : EOL+ 'SIG_VALTYPE_' msgId=Integer signalName=ID ':' signalExtendedValueType=Integer ';'

This is confirmed using Vector's CANdb++ program, which refuses to parse DBC files without the colon, and generates its own DBC files with the colon. As an example from a generated file:
SIG_VALTYPE_ 1231 BusVoltage : 1;

Could this be fixed?