Don't crash running the Account/Account Txn Reports from A/R (#460432)

Two fixes here:

* make sure to call the correct report.  The C code calls into scheme
  with a #f, not '(), so check for both cases in standard-reports.scm.

* In the owner-report, don't return #f or '() but rather return -1
  when the user tries to run the Account Transaction Report on A/R or
  A/P when they don't have a transaction selected.  This will at least
  stop gnucash from crashing, but it will appear that gnucash isn't
  doing anything.  A step in the right direction but still not the
  best solution.



git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@16361 57a11ea4-9604-0410-9ed3-97b8803252fd

src/business/business-reports/owner-report.scm

@@ -719,7 +719,7 @@
 
   (let* ((temp-owner (gncOwnerCreate))
 	 (owner (gnc:owner-from-split split temp-owner))
-	 (res #f))
+	 (res -1)) ;; XXX -- in this case we should create an error report
 
     (if (not (null? owner))
 	(set! res (gnc:owner-report-create owner account)))

src/report/standard-reports/standard-reports.scm

@@ -60,7 +60,7 @@
     (gnc:debug "hash: " gnc:*register-report-hash*)
     (gnc:debug "split: " split)
     (if type-info
-	(if (not (null? split))
+	(if (and split (not (null? split)))
 	    (begin (gnc:debug "get-split...") (get-split type-info))
 	    (begin (gnc:debug "get-non-split...") (get-non-split type-info)))
 	#f)))