rename none to null

examples/programs/arraylist/main.bro

@@ -20,11 +20,11 @@ init func(allocator mem.Allocator) State {
 }
 
 hide fail_alloc func(_ ?@mut anyopaque, _ usize, _ usize) ?*mut u8 {
-	return none
+	return null
 }
 
 hide fail_realloc func(_ ?@mut anyopaque, _ ?*mut u8, _ usize, _ usize, _ usize) ?*mut u8 {
-	return none
+	return null
 }
 
 hide fail_free func(_ ?@mut anyopaque, _ ?*mut u8, _ usize, _ usize) void {}
@@ -36,7 +36,7 @@ hide fail_vtable mem.AllocatorVTable :: mem.AllocatorVTable {
 }
 
 hide fail_allocator mem.Allocator :: mem.Allocator {
-	context = none,
+	context = null,
 	vtable = &fail_vtable,
 }