fixed memory leak

ext/pgsql/pgsql.c

@@ -940,6 +940,7 @@ static void php3_pgsql_fetch_hash(INTERNAL_FUNCTION_PARAMETERS, int result_type)
 				field_name = PQfname(pgsql_result,i);
 				add_assoc_stringl(return_value, field_name, data, data_len, should_copy);
 			}
+	efree(element);
         } else {
             /* NULL field, don't set it */
             /* add_get_index_stringl(return_value, i, empty_string, 0, (void **) &pval_ptr); */