mostly standardize to object event to prep for disassembly

asm/field_screen_effect.s

@@ -942,10 +942,10 @@ _0807F542:
 	lsls r0, r1, 3
 	adds r0, r1
 	lsls r0, 2
-	ldr r1, _0807F580 @ =gMapObjects
+	ldr r1, _0807F580 @ =gObjectEvents
 	adds r0, r1
 	movs r1, 0x2
-	bl FieldObjectTurn
+	bl ObjectEventTurn
 	ldr r1, _0807F584 @ =gTasks
 	lsls r0, r6, 2
 	adds r0, r6
@@ -958,7 +958,7 @@ _0807F542:
 	.align 2, 0
 _0807F578: .4byte gUnknown_841B5B6
 _0807F57C: .4byte gPlayerAvatar
-_0807F580: .4byte gMapObjects
+_0807F580: .4byte gObjectEvents
 _0807F584: .4byte gTasks
 _0807F588:
 	lsls r4, r6, 2