Silent MALLOC/REALLOC error

Hello, psqlODBC team.

When we fetch large data via psqlodbc, we sometimes fail to
get all rows completely without any API's error responses;
SQLExecDirect returns SQL_SUCCESS and SQLFetch returns just SQL_NODATA.
But there are QR_REALLOC_error reported in mylog at that time.

I reproduced it by tweaking QR_REALLOC_return_with_error macro
to intentionally fail to allocate memory frequently.

I propose the patch attached.
It makes the code in CC_send_query_append() go out the while-loop immediately
after CC_from_PGresult() at the case PORES_BAD_RESPONSE, PORES_FATAL_ERROR or PORES_NO_MEMORY_ERROR.

Thanks,
Haruka Takatsuka