Hello. The trigger below updates a custom Activity field for Event called "New_Business_Opportunity__c" to true if the Related To field of the event is an Opportunity with a certain record type. My org uses LinkPoint360 to sync Outlook calendar items to Salesforce, and a number of users have been experiencing issues when LinkPoint attempts to create Salesforce events using Outlook calendar items. Salesforce items do not get created, and the following error is captured in some event logs:

Apex script unhandled trigger exception by user/organization: 00560000001SP8S/00D60000000JyqG

updateOppEventCheckbox: execution of BeforeInsert

caused by: System.NullPointerException: Attempt to de-reference a null object

Trigger.updateOppEventCheckbox: line 8, column 1

 Here is the trigger code:

trigger updateOppEventCheckbox on Event(before insert, before update) {
  map<id,opportunity> opportunities = new map<id,opportunity>();
  for(event record:trigger.new)
    if(record.whatid!=null&&record.whatid.getsobjecttype()==opportunity.sobjecttype)
    opportunities.put(record.whatid,null);
  opportunities.putAll([select id,recordtype.developername from opportunity where id in :opportunities.keyset()]);
  for(event record:trigger.new)
    record.New_Business_Opportunity__c = opportunities.containskey(record.whatid) && opportunities.get(record.whatid).recordtype.developername.contains('Standard');
}

Can anyone tell me if there is a way to optimize this code so that the error clears? Some users are losing Outlook calendar data, so this is a potentially big problem :(

Thank you!