When coding a trigger, assume that the "oldmask" requires all columns until

we know otherwise.  That pessimistic assumption assures that all necessary
parameters are available on a cascading delete trigger.
Ticket [e25d9ea771f]

FossilOrigin-Name: 03e464be51a1c36fc02cf31178ae91f736dfddd6

src/trigger.c

@@ -809,6 +809,7 @@ static TriggerPrg *codeRowTrigger(
   pProgram->nRef = 1;
   pPrg->pTrigger = pTrigger;
   pPrg->orconf = orconf;
+  pPrg->oldmask = 0xffffffff;
 
   /* Allocate and populate a new Parse context to use for coding the 
   ** trigger sub-program.  */