Prevent logging "failed to stat file: success" for temp files

This was broken in commit bc334748, the
addition of statistics counters for temp files.

Reported by Thom Brown

src/backend/storage/file/fd.c

@@ -1128,13 +1128,13 @@ FileClose(File file)
 									vfdP->fileName,
 									(unsigned long) filestats.st_size)));
 			}
+		}
 		else
 		{
 			errno = stat_errno;
 			elog(LOG, "could not stat file \"%s\": %m", vfdP->fileName);
 		}
 	}
-	}
 
 	/* Unregister it from the resource owner */
 	if (vfdP->resowner)