attempt to fix the crash when loading back the neutral stage

Online/Core/Hacks/Stadium/CustomZeroBuffer.asm

@@ -0,0 +1,43 @@
+################################################################################
+# Address: 0x801c65c8
+# Tags: [affects-gameplay]
+################################################################################
+
+.include "Common/Common.s"
+
+.set REG_DATA, 31
+.set HSD_FreeToHeap, 0x80015CA8
+
+CODE_START:
+  mr. REG_DATA, r3
+  beq EXIT
+
+  lwz r4, 0(REG_DATA) 
+  addis	r0, r4, 1
+  cmplwi r0, 65535 # if the file size is not -1
+  beq ZERO_MEM
+
+  # check if this area has been zeroed already. if it was, this was probably a rollback
+  lwz r0, 0(REG_DATA)
+  lwz r3, 4(REG_DATA)
+  or r3, r0, r3
+  lwz r0, 8(REG_DATA)
+  or. r3, r0, r3
+  beq EXIT
+
+  # when we reach here, it means we are probably freeing the transformation file back to the heap
+  lwz r3, 8(REG_DATA)
+  cmplwi r3, 1
+  bne ZERO_MEM
+
+  li r3, 0
+  lwz r4, 0(REG_DATA)
+  branchl r12, HSD_FreeToHeap
+
+  ZERO_MEM:
+    mr r3, REG_DATA
+    li r4, 12
+    branchl r12, Zero_AreaLength
+
+EXIT:
+  branch r12, 0x801c660c # end of function

Output/InjectionLists/list_netplay.json

@@ -749,6 +749,13 @@
    "Annotation": "Online/Core/Hacks/Stadium/ChangeJumbotronText.asm",
    "Tags": ""
   },
+  {
+   "InjectionAddress": "801C65C8",
+   "Name": "Required: Slippi Online",
+   "Codetype": "Auto",
+   "Annotation": "Online/Core/Hacks/Stadium/CustomZeroBuffer.asm",
+   "Tags": "[affects-gameplay]"
+  },
   {
    "InjectionAddress": "801D4760",
    "Name": "Required: Slippi Online",

Output/Netplay/GALE01r2.ini

@@ -2459,6 +2459,23 @@ C21D2D38 00000016 #Online/Core/Hacks/Stadium/ChangeJumbotronText.asm
 800100E4 382100E0
 7C0803A6 7FC3F378
 60000000 00000000
+C21C65C8 00000010 #Online/Core/Hacks/Stadium/CustomZeroBuffer.asm
+7C7F1B79 41820068
+809F0000 3C040001
+2800FFFF 41820040
+801F0000 807F0004
+7C031B78 801F0008
+7C031B79 41820040
+807F0008 28030001
+4082001C 38600000
+809F0000 3D808001
+618C5CA8 7D8903A6
+4E800421 7FE3FB78
+3880000C 3D808000
+618CC160 7D8903A6
+4E800421 3D80801C
+618C660C 7D8903A6
+4E800420 00000000
 C21D4760 0000000A #Online/Core/Hacks/Stadium/GrPsxIsValid.asm
 38600002 3D80801C
 618C2BA4 7D8903A6

Output/Netplay/GALJ01r2.ini

@@ -2458,6 +2458,23 @@ C21D2D38 00000016 #Online/Core/Hacks/Stadium/ChangeJumbotronText.asm
 800100E4 382100E0
 7C0803A6 7FC3F378
 60000000 00000000
+C21C65C8 00000010 #Online/Core/Hacks/Stadium/CustomZeroBuffer.asm
+7C7F1B79 41820068
+809F0000 3C040001
+2800FFFF 41820040
+801F0000 807F0004
+7C031B78 801F0008
+7C031B79 41820040
+807F0008 28030001
+4082001C 38600000
+809F0000 3D808001
+618C5CA8 7D8903A6
+4E800421 7FE3FB78
+3880000C 3D808000
+618CC160 7D8903A6
+4E800421 3D80801C
+618C660C 7D8903A6
+4E800420 00000000
 C21D4760 0000000A #Online/Core/Hacks/Stadium/GrPsxIsValid.asm
 38600002 3D80801C
 618C2BA4 7D8903A6