fix: mcx_delchunk was not updating the byte offset of affected chunks.

src/dat/mcx.c

@@ -14,6 +14,7 @@ void mcx_delchunk(u8 *restrict buf, int chunk) {
 	u32 *table = (u32 *)buf;
 	size_t bidx = (table[chunk] >> 8) * 0x1000;   // compute the byte offset the chunk starts at
 	size_t blen = (table[chunk] & 0xFF) * 0x1000; // compute the byte length of the chunk
+	size_t slen = (table[chunk] & 0xFF);          // acquire the sector length of the chunk
 	table[chunk] = 0;
 	table[chunk + 0x400] = time(NULL); // assign the current time to the timestamp, for correctness  NOTE: might need to zero-out instead
 
@@ -23,8 +24,10 @@ void mcx_delchunk(u8 *restrict buf, int chunk) {
 
 	// count the amount of bytes that we must move
 	blen = 0;
-	for (chunk++; chunk < 0x400; chunk++)
+	for (chunk++; chunk < 0x400; chunk++) {
 		blen += table[chunk] & 0xFF * 0x1000;
+		table[chunk] -= htobe32(slen << 8);
+	}
 	memmove(head, tail, blen);
 }