Action isn't optional with a eventex that has a where clause

[windley]

This parses:

rule clearVisits is active {
  select when pageview where url.match(re#/.*clear.*/#)
  noop();
  fired {
      clear ent:foo
  }
}

so does this:

rule clearVisits is active {
  select when pageview url re#/.*clear.*/#
  fired {
      clear ent:foo
  }
}

This doesn't:

rule clearVisits is active {
  select when pageview where url.match(re#/.*clear.*/#)
  fired {
    clear ent:visits;
  }
}

[windley]

@alexkolson created a pull request on this that didn't solve the problem. I've got tests that show this error now.

For some reason, the parser can't recognize the end of the expression after the where clause without the action.