Decimal number like .8 cannot be accepted

[gaobaiming]

When trying to insert to a column table, with decimal number '.8' ( for example) to a column of DECIMAL data type, an error 'Wrong input for DECIMAL type' would be raised.

Kindly fix the issue, thanks!

p.s. 1. data like '0.8' is OK;
2. Is it OK if I submit a fix for this problem and will the submit be accepted?