fix: disable flute in rain state (except glitched modes)

fix(msu): GTBK music in DR

hooks.asm

@@ -1300,6 +1300,9 @@ org $08D395 ; <- 45395 - ancilla_bird_travel_intro.asm : 253
 JSL.l UpgradeFlute
 NOP #2
 ;--------------------------------------------------------------------------------
+org $07A408 ; LDA.l $7EF34C
+JSL.l FluteCallForDuck
+;--------------------------------------------------------------------------------
 org $05E4D7 ; <- 2E4D7 - sprite_witch.asm : 213
 JSL.l RemoveMushroom
 NOP #2

inventory.asm

@@ -820,6 +820,20 @@ UpgradeFlute:
 	LDA.b #$03 : STA FluteEquipment ; upgrade primary inventory
 RTL
 ;--------------------------------------------------------------------------------
+; FluteCallForDuck:
+;--------------------------------------------------------------------------------
+; sets A to #$02 to ignore summoning the duck
+FluteCallForDuck:
+	LDA.l WarningFlags : AND.b #$20 : BNE .vanilla ; glitched modes allowed flute in rain state
+	LDA.l ProgressIndicator : CMP.b #$02 : BCS .vanilla ; must rescue Zelda first
+
+	.noDuck
+	LDA.b #$02 : RTL
+
+	.vanilla
+	LDA.l FluteEquipment ; what we wrote over
+RTL
+;--------------------------------------------------------------------------------
 
 ;--------------------------------------------------------------------------------
 ; CheckKeys:

msu.asm

@@ -271,7 +271,13 @@ CheckMusicLoadRequest:
             LDA $040C
             CMP.b #$08 : BNE .check_fallback  ; Hyrule Castle 2
 .dungeon
-            LDA $040C : LSR : !ADD.b #33 : STA !REG_MUSIC_CONTROL_REQUEST
+            LDA $040C : CMP.b #$1A : BNE +
+                PHA : LDA.l DRMode : BEQ ++
+                    LDA.w BigKeyField : AND.b #$04 : BEQ ++
+                        ; if door rando and entering GT with BK
+                        PLA : LDA.b #59 : BRA .check_fallback-3
+                ++ PLA
+            + LSR : !ADD.b #33 : STA !REG_MUSIC_CONTROL_REQUEST
 
 .check_fallback
             LDX !REG_MUSIC_CONTROL_REQUEST