fdo#58376 SwFrm::CheckPageDescs: fix crash on fallback

The problem was that fallback worked like this: if we have no page
style, then right falls back to left, and left falls back to right.
This is no longer enough when 'first' is missing: for odd 'first' pages,
first we should fall back to right.
(cherry picked from commits 1b67d91b0065c46ca7b36db0836c9159ca8b50cf and
5b7810581c573c4406a0e4529193dd3a7871a56c)

1 files changed, 4 insertions, 1 deletions

diff --git a/sw/source/core/layout/pagechg.cxx b/sw/source/core/layout/pagechg.cxx
index 8509a40f3fe8..54b2f223f1b9 100644
--- a/sw/source/core/layout/pagechg.cxx
+++ b/sw/source/core/layout/pagechg.cxx
@@ -1194,7 +1194,10 @@ void SwFrm::CheckPageDescs( SwPageFrm *pStart, sal_Bool bNotifyFields )
             else if ( !pFmtWish )                                       //6.
             {
                 //Format mit verdrehter Logic besorgen.
-                pFmtWish = bOdd ? pDesc->GetLeftFmt() : pDesc->GetRightFmt();
+                if (bFirst)
+                    pFmtWish = bOdd ? pDesc->GetRightFmt() : pDesc->GetLeftFmt();
+                if (!pFmtWish)
+                    pFmtWish = bOdd ? pDesc->GetLeftFmt() : pDesc->GetRightFmt();
                 if ( pPage->GetFmt() != pFmtWish )
                     pPage->SetFrmFmt( pFmtWish );
             }