Bugfix in xnav destructor

xtt/lib/xtt/gtk/xtt_xnav_gtk.cpp

@@ -122,12 +122,12 @@ XNavGtk::~XNavGtk()
   }
   menu_tree_free();
   for ( int i = 0; i < brow_cnt; i++) {
-    brow_DeleteSecondaryCtx( brow_stack[i]->ctx);
     brow_stack[i]->free_pixmaps();
+    brow_DeleteSecondaryCtx( brow_stack[i]->ctx);
     delete brow_stack[i];
   }
-  brow_DeleteSecondaryCtx( collect_brow->ctx);
   collect_brow->free_pixmaps();
+  brow_DeleteSecondaryCtx( collect_brow->ctx);
   delete collect_brow;
   delete brow;
   if ( op)

xtt/lib/xtt/motif/xtt_xnav_motif.cpp

@@ -139,13 +139,13 @@ XNavMotif::~XNavMotif()
   }
   menu_tree_free();
   for ( int i = 0; i < brow_cnt; i++) {
-    brow_DeleteSecondaryCtx( brow_stack[i]->ctx);
     brow_stack[i]->free_pixmaps();
+    brow_DeleteSecondaryCtx( brow_stack[i]->ctx);
     delete brow_stack[i];
   }
   brow_DeleteSecondaryCtx( collect_brow->ctx);
-  collect_brow->free_pixmaps();
   delete collect_brow;
+  collect_brow->free_pixmaps();
   delete brow;
   if ( op)
     delete op;