TSServer: configFileDiag event sent without trigger file

[dbaeumer]

TypeScript Version: 2.0.6-insider

Interface is defined as follows (triggerFile not optional):

export interface ConfigFileDiagnosticEventBody {
    /**
     * The file which trigged the searching and error-checking of the config file
     */
    triggerFile: string;
    /**
     * The name of the found config file.
     */
    configFile: string;
    /**
     * An arry of diagnostic information items for the found config file.
     */
    diagnostics: Diagnostic[];
}