[Tile-serving] [osm2pgsql] explicit type conversions to reduce MSVC warnings (#484)

[Paul Norman]

> @@ -25,10 +25,10 @@ void escape(const std::string &src, std::string& dst);
>  
>  
>  inline void pgsql_CopyData(const char *context, PGconn *sql_conn, const char *sql) {
> -    pgsql_CopyData(context, sql_conn, sql, strlen(sql));
> +    pgsql_CopyData(context, sql_conn, sql, (int) strlen(sql));

the length goes to `PQputCopyData(PGconn *conn, const char *buffer, int nbytes);` so we're fine

---
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/pull/484/files#r43435204
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