libavcodec/bmp.c:167: error: Uninitialized Value
  The value read from rgb[_] was never initialized.

libavcodec/bmp.c:167:37: 
165.             avctx->pix_fmt = AV_PIX_FMT_RGB555;
166.         else if (comp == BMP_BITFIELDS) {
167.             if (rgb[0] == 0xF800 && rgb[1] == 0x07E0 && rgb[2] == 0x001F)
                                         ^
168.                avctx->pix_fmt = AV_PIX_FMT_RGB565;
169.             else if (rgb[0] == 0x7C00 && rgb[1] == 0x03E0 && rgb[2] == 0x001F)
