BufferAlloc() doesn't allocate write error buffers.

Remove compiler waring(my fault).

src/backend/storage/buffer/bufmgr.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.84 2000/09/29 01:23:47 inoue Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.85 2000/09/29 03:55:45 inoue Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -448,6 +448,16 @@ BufferAlloc(Relation reln,
 		{
 			bool		smok;
 
+			/*
+			 *	skip write error buffers 
+			 */
+			if ((buf->flags & BM_IO_ERROR) != 0)
+			{
+				PrivateRefCount[BufferDescriptorGetBuffer(buf) - 1] = 0;
+				buf->refcount--;
+				buf = (BufferDesc *) NULL;
+				continue;
+			}
 			/*
 			 * Set BM_IO_IN_PROGRESS to keep anyone from doing anything
 			 * with the contents of the buffer while we write it out. We
@@ -2529,7 +2539,7 @@ AbortBufferIO(void)
 		else
 		{
 			Assert((buf->flags & BM_DIRTY) != 0);
-			if (buf->flags & BM_IO_ERROR != 0)
+			if ((buf->flags & BM_IO_ERROR) != 0)
 			{
 				elog(NOTICE, "write error may be permanent: cannot write block %u for %s/%s",
 				buf->tag.blockNum, buf->blind.dbname, buf->blind.relname);