Handle case when attempting to load a block from the archive by reference, but the referenced block is in the main block repository, not the archive. This is the case with the genesis block.

Should fix issue where no block summaries were returned when syncing from block 1

src/main/java/org/qortal/repository/hsqldb/HSQLDBBlockArchiveRepository.java

@@ -71,6 +71,10 @@ public class HSQLDBBlockArchiveRepository implements BlockArchiveRepository {
     @Override
     public BlockData fromReference(byte[] reference) throws DataException {
         BlockData referenceBlock = this.repository.getBlockArchiveRepository().fromSignature(reference);
+        if (referenceBlock == null) {
+            // Try the main block repository. Needed for genesis block.
+            referenceBlock = this.repository.getBlockRepository().fromSignature(reference);
+        }
         if (referenceBlock != null) {
             int height = referenceBlock.getHeight();
             if (height > 0) {