Remove empty statement

Peter Smith

Discussion: https://www.postgresql.org/message-id/CAHut%2BPtRGVuj8Q_GpHHxZyk7fGwdYDG8_s4GSfKoc_4Yd9vR-w%40mail.gmail.com

Author: j-naylor

src/backend/access/transam/xlogprefetcher.c

@@ -656,7 +656,7 @@ XLogPrefetcherNextBlock(uintptr_t pgsr_private, XLogRecPtr *lsn)
 			if (!block->in_use)
 				continue;
 
-			Assert(!BufferIsValid(block->prefetch_buffer));;
+			Assert(!BufferIsValid(block->prefetch_buffer));
 
 			/*
 			 * Record the LSN of this record.  When it's replayed,