Resolves: fdo#66700 don't crash on querying zoom state with no SfxObjectShell

Change-Id: Id2943c92ce6deaae3e4d507a35c08466db21cece

sfx2/source/appl/appserv.cxx

@@ -602,6 +602,10 @@ void SfxApplication::MiscExec_Impl( SfxRequest& rReq )
         case SID_ZOOM_ENTIRE_PAGE:
         case SID_ZOOM_PAGE_WIDTH:
         {
+            SfxObjectShell* pCurrentShell = SfxObjectShell::Current();
+            if (!pCurrentShell)
+                return;
+
             // make sure aZoom is initialized with a proper value if SetType
             // doesn't work
             SvxZoomItem aZoom( SVX_ZOOM_PERCENT, 100 );
@@ -634,7 +638,7 @@ void SfxApplication::MiscExec_Impl( SfxRequest& rReq )
                     break;
             }
 
-            SfxViewFrame::Current()->GetDispatcher()->Execute(SID_ATTR_ZOOM, SFX_CALLMODE_ASYNCHRON, &aZoom, 0L);
+            pCurrentShell->GetDispatcher()->Execute(SID_ATTR_ZOOM, SFX_CALLMODE_ASYNCHRON, &aZoom, 0L);
 
             break;
         }
@@ -818,8 +822,11 @@ void SfxApplication::MiscState_Impl(SfxItemSet &rSet)
                 case SID_ZOOM_ENTIRE_PAGE:
                 case SID_ZOOM_PAGE_WIDTH:
                     {
+                        SfxObjectShell* pCurrentShell = SfxObjectShell::Current();
+
                         const SfxPoolItem *pItem;
-                        SfxItemState aState = SfxViewFrame::Current()->GetDispatcher()->QueryState(SID_ATTR_ZOOM, pItem);
+                        SfxItemState aState = pCurrentShell ?
+                            pCurrentShell->GetDispatcher()->QueryState(SID_ATTR_ZOOM, pItem) : SFX_ITEM_DISABLED;
                         if ( aState == SFX_ITEM_DISABLED )
                             rSet.DisableItem( nWhich );
                     }