Improve error handling in HBCI operations.

[Christian Stimming]

Log Message:
-----------
Improve error handling in HBCI operations.

2005-03-12  Christian Stimming  <stimming at tuhh.de>

	* src/import-export/hbci/gnc-hbci-gettrans.c, hbci-interaction.h:
	Improve error handling in HBCI operations.

Modified Files:
--------------
    gnucash:
        ChangeLog
    gnucash/src/import-export/hbci:
        gnc-hbci-gettrans.c
        hbci-interaction.c
        hbci-interaction.h
        hbci-interactionP.h