Ensure pointers are put back to NULL when freed.

--Cette ligne, et les suivantes ci-dessous, seront ignorées--

M    trunk/palette.c
M    trunk/init.c
M    trunk/engine.c
M    trunk/filesel.c
M    trunk/miscfileformats.c
M    trunk/pages.c
M    trunk/brush_ops.c
M    trunk/op_c.c
M    trunk/operatio.c
M    trunk/brush.c
M    trunk/loadsave.c
M    trunk/graph.c
M    trunk/fileformats.c
M    trunk/main.c


git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@1277 416bcca6-2ee7-4201-b75f-2eb2f807beb1

pages.c

@@ -116,8 +116,9 @@ void Free_layer(T_Page * page, byte layer)
   ptr = (short *)(page->Image[layer]);
   if (-- (*(ptr-1))) // Users--
     return;
-  else
+  else {
     free(ptr-1);
+  }
     
   // Stats
   Stats_pages_number--;
@@ -486,6 +487,7 @@ void Free_last_page_of_list(T_List_of_pages * list)
         page->Prev->Next = page->Next;
         Clear_page(page);
         free(page);
+        page = NULL;
         list->List_size--;
     }
   }