In dumpTable, re-instate the skipping logic

Pretty sure I removed this based on some incorrect thinking that it was
no longer possible to reach this point for a table which will not be
dumped, but that's clearly wrong.

Pointed out on IRC by Erik Rijkers.

src/bin/pg_dump/pg_dump.c

@@ -14846,6 +14846,13 @@ dumpTable(Archive *fout, TableInfo *tbinfo)
 	DumpOptions *dopt = fout->dopt;
 	char	   *namecopy;
 
+	/*
+	 * noop if we are not dumping anything about this table, or if we are
+	 * doing a data-only dump
+	 */
+	if (!tbinfo->dobj.dump || dopt->dataOnly)
+		return;
+
 	if (tbinfo->relkind == RELKIND_SEQUENCE)
 		dumpSequence(fout, tbinfo);
 	else