3DS: Don't detach autosave thread (fixes mgba-emu#3561)

This leads to a double-free

Author: endrift

CHANGES

@@ -40,6 +40,7 @@ Emulation fixes:
  - GBA Video: Fix edge case with double-height sprites wrapping (fixes mgba.io/i/2824)
  - GBA Video: VCOUNTER flag should be updated on DISPSTAT write (fixes mgba.io/i/1873)
 Other fixes:
+ - 3DS: Don't detach autosave thread (fixes mgba.io/i/3561)
  - Core: Fix inconsistencies with setting game-specific overrides (fixes mgba.io/i/2963)
  - Debugger: Fix writing to specific segment in command-line debugger
  - GB Video: Fix video log replaying freezing when video is disabled

src/platform/3ds/main.c

@@ -1066,7 +1066,7 @@ int main(int argc, char* argv[]) {
 	ConditionInit(&runner.autosave.cond);
 
 	APT_SetAppCpuTimeLimit(20);
-	runner.autosave.thread = threadCreate(mGUIAutosaveThread, &runner.autosave, 0x2000, 0x1F, 1, true);
+	runner.autosave.thread = threadCreate(mGUIAutosaveThread, &runner.autosave, 0x2000, 0x1F, 1, false);
 
 	Thread thread2;
 	if (ThreadCreate(&thread2, _core2Test, NULL) == 0) {