libswscale/yuv2rgb.c:322: error: Uninitialized Value
  The value read from pa_2 was never initialized.

libswscale/yuv2rgb.c:322:5: 
320.     PUTRGBA(dst_1, py_1, pa_1, 1, 0);
321.     pa_1 += 4;
322.     pa_2 += 4;
         ^
323. ENDYUV2RGBLINE(8, 1)
324.     LOADCHROMA(0);
