MngBuffer         296 coders/png.c     MngBuffer
MngBuffer        1152 coders/png.c         if (mng_info->ob[i] != (MngBuffer *) NULL)
MngBuffer        1165 coders/png.c         mng_info->ob[i]=(MngBuffer *) NULL;
MngBuffer        2951 coders/png.c         if (mng_info->ob[object_id] == (MngBuffer *) NULL)
MngBuffer        2956 coders/png.c             mng_info->ob[object_id]=(MngBuffer *)
MngBuffer        2957 coders/png.c               AcquireMagickMemory(sizeof(MngBuffer));
MngBuffer        2959 coders/png.c             if (mng_info->ob[object_id] != (MngBuffer *) NULL)
MngBuffer        2966 coders/png.c         if ((mng_info->ob[object_id] == (MngBuffer *) NULL) ||
MngBuffer        2969 coders/png.c             if (mng_info->ob[object_id] == (MngBuffer *) NULL)
MngBuffer        4958 coders/png.c                    if (mng_info->ob[i] != (MngBuffer *) NULL)