Merge pull request #8413 from radarhere/sgirle_memory

Author: hugovk

src/libImaging/SgiRleDecode.c

@@ -195,6 +195,7 @@ ImagingSgiRleDecode(Imaging im, ImagingCodecState state, UINT8 *buf, Py_ssize_t
  }
  _imaging_seek_pyFd(state->fd, SGI_HEADER_SIZE, SEEK_SET);
  if (_imaging_read_pyFd(state->fd, (char *)ptr, c->bufsize) != c->bufsize) {
+ free(ptr);
  state->errcode = IMAGING_CODEC_UNKNOWN;
  return -1;
  }