Soap Fault is not working if MySQL is in strict mode

If MySQL is in strict mode the next error is thrown when Soap Fault is produced:
SQLSTATE[HY000]: General error: 1366 Incorrect integer value: 'error' for column 'severity' at row

The output in this case is empty instead of the generated soap fault xml.

The attached patch fixes this error, the fourth parameter of watchdog function should be an integer instead of string.