Initialize variable to placate compiler.

robertmhaas · robertmhaas · commit a030a0c5ccb1 · 2021-10-25T16:31:00.000-04:00
Per Nathan Bossart. Discussion: http://postgr.es/m/FECEE7FC-CB74-45A9-BB24-89FEE52A9585@amazon.com
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
@@ -9038,7 +9038,7 @@ CreateCheckPoint(int flags)
 	XLogRecPtr	last_important_lsn;
 	VirtualTransactionId *vxids;
 	int			nvxids;
-	int			oldXLogAllowed;
+	int			oldXLogAllowed = 0;
 
 	/*
 	 * An end-of-recovery checkpoint is really a shutdown checkpoint, just
