Empty comment followed by a query causes MALFORMED_QUERY

[pllevy173]

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Describe the bug
Empty comment seems to be badly interpreted => inaccurate error message.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Data Export'
2. in Export Query, enter "/**/ SELECT id FROM Contact"
3. In Export Result, we get message "MALFORMED_QUERY: SOQL statements cannot be empty or null"

Expected behavior
"/**/" should not cause any issue.
I expected to have the result of my query.

Desktop (please complete the following information):

• OS: Windows
• Browser : Chrome
• Version : v1.38/65