[core] Update FatFs submodule and KallistiOS.

DC-SWAT · DC-SWAT · commit 10d9056f9abd · 2025-10-01T15:16:27.000+07:00
Also fix some startup issues.
diff --git a/lib/fatfs b/lib/fatfs
@@ -1 +1 @@
-Subproject commit c0948f9e5677890622151f63a75c1bc209e97a14
+Subproject commit 0639ed41c159bd6574a2f6ffc7c5fcd8caa095ff
diff --git a/sdk/doc/KallistiOS.txt b/sdk/doc/KallistiOS.txt
@@ -1 +1 @@
-8fb6ea27eb3fd8f6f1d08bdafffa627883b17185
+c601a70e93d67872953d2c091d496101c5692c56
diff --git a/src/main.c b/src/main.c
@@ -319,9 +319,6 @@ int InitDS() {
 		strcat(fn, " &");
 		setenv("STARTUP_CMD", fn, 1);
 	}
-	else {
-		setenv("STARTUP_CMD", "", 1);
-	}
 
 #ifdef DS_DEBUG
 	uint64 t_end = timer_ms_gettime64();
