fix checkpoint loading (use carry for add)

main.c

@@ -612,8 +612,11 @@ int main(int argc,char **argv)
 				fclose(checkout);
 
 				// Apply checkpoint to determseed
-				for (int i = 0; i < SEED_LEN; i++)
-					determseed[i] += checkpoint[i];
+				bool carry = 0;
+				for (int i = 0; i < SEED_LEN; i++) {
+					determseed[i] += checkpoint[i] + carry;
+					carry = determseed[i] < checkpoint[i];
+				}
 			}
 		}
 	}

worker.c

@@ -150,6 +150,7 @@ union pubonionunion {
 	} i;
 } ;
 
+/*
 // little endian inc
 static void addsk32(u8 *sk)
 {
@@ -160,6 +161,7 @@ static void addsk32(u8 *sk)
 		if (!c) break;
 	}
 }
+*/
 
 // 0123 4567 xxxx --3--> 3456 7xxx
 // 0123 4567 xxxx --1--> 1234 567x