MngBuffer         792 coders/png.c     MngBuffer
MngBuffer        1676 coders/png.c         if (mng_info->ob[i] != (MngBuffer *) NULL)
MngBuffer        1689 coders/png.c         mng_info->ob[i]=(MngBuffer *) NULL;
MngBuffer        3731 coders/png.c         if (mng_info->ob[object_id] == (MngBuffer *) NULL)
MngBuffer        3736 coders/png.c             mng_info->ob[object_id]=(MngBuffer *)
MngBuffer        3737 coders/png.c               AcquireMagickMemory(sizeof(MngBuffer));
MngBuffer        3739 coders/png.c             if (mng_info->ob[object_id] != (MngBuffer *) NULL)
MngBuffer        3746 coders/png.c         if ((mng_info->ob[object_id] == (MngBuffer *) NULL) ||
MngBuffer        3749 coders/png.c             if (mng_info->ob[object_id] == (MngBuffer *) NULL)
MngBuffer        5770 coders/png.c                    if (mng_info->ob[i] != (MngBuffer *) NULL)