[general-journal] set document title after rendering

Instead of setting document <title> register.scm's General/Title
option, set it in the document returned by register.scm's
renderer. This is in anticipation of "General"/"Title" option in
register.scm being removed.

gnucash/report/standard-reports/general-journal.scm

@@ -90,14 +90,7 @@
       )
      )
     ;; we'll leave query malloc'd in case this is required by the C side...
-    
-    ;; set options in the general tab...
-    (set-option!
-     gnc:pagename-general (N_ "Title") (_ reportname))
-    ;; we can't (currently) set the Report name here
-    ;; because it is automatically set to the template
-    ;; name... :(
-    
+
     ;; set options in the display tab...
     (for-each
      (lambda (l)
@@ -126,7 +119,10 @@
 
 (define (general-journal-renderer report-obj)
   ;; just delegate rendering to the Register Report renderer...
-  ((gnc:report-template-renderer/report-guid regrptguid regrptname) report-obj))
+  (let* ((renderer (gnc:report-template-renderer/report-guid regrptguid #f))
+         (doc (renderer report-obj)))
+    (gnc:html-document-set-title! doc (_ reportname))
+    doc))
 
 (gnc:define-report 
  'version 1