Bug 603183 - Equity statement shows incorrect changes

Add function gnc:account-get-total-flow to report-utilities.scm

This function filters the splits from the source to the target accounts
and returns a commodity collector.
It does NOT do currency exchanges.

Author:    Carsten Rinke <carsten.rinke@gmx.de>

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23156 57a11ea4-9604-0410-9ed3-97b8803252fd
Bug 603183 - Equity statement shows incorrect changes

To be run after the patch for report-utilities.scm

Export the new function gnc:account-get-total-flow from report-utilities.scm.

Author:    Carsten Rinke <carsten.rinke@gmx.de>

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23157 57a11ea4-9604-0410-9ed3-97b8803252fd
Bug 603183 - Equity statement shows incorrect changes

Apply the new function gnc:account-get-total-flow for the "Withdrawal" calculation.

Depends on the patches for
- report-utilities.scm
- report-system.scm

Author:    Carsten Rinke <carsten.rinke@gmx.de>

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23158 57a11ea4-9604-0410-9ed3-97b8803252fd