Fix some pokecrystal bug and glitches (#8)

Credits sequence changes move selection menu behavior; Swimming NPCs aren't limited by their movement radius; No bump noise if standing on tile E; The unused phonecall script command may crash; ScriptCall can overflow wScriptStack and crash; LoadSpriteGFX does not limit the capacity of UsedSprites; ReadObjectEvents overflows into wObjectMasks; ClearWRAM only clears WRAM bank 1; BattleAnimCmd_ClearObjs only clears the first 6⅔ objects; Options menu fails to clear joypad state on initialization

engine/phone/phone.asm

@@ -93,19 +93,6 @@ GetRemainingSpaceInPhoneList:
 
 INCLUDE "data/phone/permanent_numbers.asm"
 
-BrokenPlaceFarString:
-; This routine is not in bank 0 and will fail or crash if called.
-	ldh a, [hROMBank]
-	push af
-	ld a, b
-	rst Bankswitch
-
-	call PlaceString
-
-	pop af
-	rst Bankswitch
-	ret
-
 CheckPhoneCall::
 ; Check if the phone is ringing in the overworld.
 
@@ -496,14 +483,12 @@ PhoneCall::
 	ld [hl], "☎"
 	inc hl
 	inc hl
-; BUG: The unused phonecall script command may crash (see docs/bugs_and_glitches.md)
-	ld a, [wPhoneScriptBank]
-	ld b, a
 	ld a, [wPhoneCaller]
 	ld e, a
 	ld a, [wPhoneCaller + 1]
 	ld d, a
-	call BrokenPlaceFarString
+	ld a, [wPhoneScriptBank]
+	call PlaceFarString
 	ret
 
 Phone_NoSignal: