Extension "MessageWords" not working due to a syntax error

If you add `MessageWords` to your extension configuration, the table will be empty after analysis.

This commit makes this extension working again.
For a test i`ve analyzed this repository. During this progress i`ve detected that the longest word is longer than 80 chars. It is 96 (it is a URL).

Due to this i`ve extended the sql column `word` to 150 chars. This might be enough for the future.