Fix BT nothing item

Author: blkerby

patches/ips/nothing_item.ips

@@ -4,3 +4,4 @@ $9600 - $9700: spark booster plms graphics
 $9700 - $9800: blue booster plm graphics
 $AF60 - $B0C0: Area FX.asm
 $B0C0 - $B100: decompression.asm
+$B100 - $B200: nothing item graphics (zeros, used only for Bomb Torizo Room; nothing_item.asm)

patches/rom_map/Bank 89.txt

@@ -9,7 +9,7 @@ org !bank_84_free_space_start
 dw $EE64, inst        ; PLM $F700 (nothing, for Bomb Torizo Room)
 
 inst:
-    dw $8764, $9700, $0000, $0000, $0000, $0000  ; Load item graphics (zeros)
+    dw $8764, $B100, $0000, $0000, $0000, $0000  ; Load item graphics (zeros, written in patch.rs)
     dw $8A24, .triggered                   ; Set link instruction for when triggered
     dw $86C1, $DF89                        ; Pre-instruction = go to link instruction if triggered
     dw $E04F                               ; Draw item frame 0 (not sure why we need to do this, but it doesn't work otherwise)

patches/src/nothing_item.asm

@@ -2740,10 +2740,17 @@ impl Patcher<'_> {
         Ok(())
     }
 
+    fn write_nothing_item_graphics(&mut self) -> Result<()> {
+        // Used in Bomb Torizo Room.
+        self.rom.write_n(snes2pc(0x89B100), &[0; 0x100])?;
+        Ok(())
+    }
+
     fn write_custom_item_graphics(&mut self) -> Result<()> {
         self.write_walljump_item_graphics()?;
         self.write_spark_booster_item_graphics()?;
         self.write_bluebooster_item_graphics()?;
+        self.write_nothing_item_graphics()?;
         Ok(())
     }