Cast some printf arguments to avoid possibly-nonportable behavior.

Per compiler warnings on buildfarm member black_firefly.

src/backend/replication/basebackup.c

@@ -867,7 +867,7 @@ _tarWriteHeader(const char *filename, const char *linktarget,
 	}
 
 	/* Mode 8 */
-	sprintf(&h[100], "%07o ", statbuf->st_mode);
+	sprintf(&h[100], "%07o ", (int) statbuf->st_mode);
 
 	/* User ID 8 */
 	sprintf(&h[108], "%07o ", statbuf->st_uid);

src/bin/pg_basebackup/pg_basebackup.c

@@ -1103,7 +1103,7 @@ BaseBackup(void)
 		if (r != bgchild)
 		{
 			fprintf(stderr, _("%s: child %i died, expected %i\n"),
-					progname, r, bgchild);
+					progname, r, (int) bgchild);
 			disconnect_and_exit(1);
 		}
 		if (!WIFEXITED(status))