Neil Williams' patch to clean up the test-book-merge.

[Derek Atkins]

Log Message:
-----------
Neil Williams' patch to clean up the test-book-merge.

	* src/engine/test/test-book-merge.c:
	  The first change is just simplification, the second change is the fix.

Tags:
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gnucash-gnome2-dev

Modified Files:
--------------
    gnucash:
        ChangeLog
    gnucash/src/engine/test:
        test-book-merge.c