Fix: It appears older VC interprets a C string as boolean here?

Author: joto

src/middle-pgsql.cpp

@@ -1167,7 +1167,8 @@ void init_params(params_t *params, options_t const &options)
 
     params->set("prefix", options.prefix);
     params->set("schema", schema);
-    params->set("unlogged", options.droptemp ? "UNLOGGED" : "");
+    params->set("unlogged",
+                options.droptemp ? std::string{"UNLOGGED"} : std::string{""});
     params->set("data_tablespace", tablespace_clause(options.tblsslim_data));
     params->set("index_tablespace", tablespace_clause(options.tblsslim_index));
     params->set("way_node_index_id_shift", static_cast<int64_t>(5));