Multi currency patch

[Herbert Thoma]

> Hi,
> 
> I recently bought some mutual funds which are denominated in USD,
> my default currency is EUR. Get quotes retrieves prices in USD. This
> leads to some minor problems:
> 
> - In the main account tree and the reports these fund evaluate to 0.00 EUR,
>   because there is no price in EUR but only in USD. 
>   I am working on a patch to do a "two stage" price db lookup to solve this
>   problem.

Here is the patch

	* src/engine/gnc-pricedb.c
	* src/engine/gnc-pricedb.h:
	  new function gnc_pricedb_lookup_latest_any_currency,
	  return any available prices for given commodity regardless
	  of currency
	* src/app-utils/gnc-ui-util.c:
	  do a "two stage" price lookup in  gnc_ui_convert_balance_to_currency
	  if no price for the commodity is found in the requested currency,
	  then look for prices in any currency and for a exchange rate from
	  the price currency to the requested currency
	* src/gnome/gnc-split-reg.c:
	  do currency conversion and show the value in the status line of
	  stock and mutual fund accounts

 Herbert.
-- 
Herbert Thoma
FhG-IIS A, Studio Department
Am Weichselgarten 3, 91058 Erlangen, Germany
Phone: +49-9131-776-323
Fax:   +49-9131-776-399
email: tma at iis.fhg.de
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