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Fix incorrect capacity adjustment in Oevent list

Was capped at 16 instead of properly growing as it should have.

--- a/bank.c

+++ b/bank.c

@@ -20,7 +20,10 @@

 Oevent* oevent_list_alloc_item(Oevent_list* olist) {

   Usz count = olist->count;

   if (olist->capacity == count) {

-    Usz capacity = count < 16 ? 16 : orca_round_up_power2(count);

+    // Note: no overflow check, but you're probably out of memory if this

+    // happens anyway. Like other uses of realloc in orca, we also don't check

+    // for a failed allocation.

+    Usz capacity = count < 16 ? 16 : orca_round_up_power2(count + 1);

     olist->buffer = realloc(olist->buffer, capacity * sizeof(Oevent));

     olist->capacity = capacity;

   }