Return RESULT_SERVER_ERROR instead of RESULT_NETWORK_ERROR where appropriate

[Kaljurand]

Original issue 23 created by Kaljurand on 2012-03-31T10:01:25.000Z:

Currently this non-well-formed response triggers the "network error" message:

{ "status": 0, "hypotheses": [

], "id": "776be34c343ec24asfaf08ed42a4998e442e" }