libswscale/yuv2rgb.c:311: error: Uninitialized Value
  The value read from pa_1 was never initialized.

libswscale/yuv2rgb.c:311:5: 
309.     PUTRGBA(dst_2, py_2, pa_2, 3, 0);
310.     PUTRGBA(dst_1, py_1, pa_1, 3, 0);
311.     pa_1 += 8;
         ^
312.     pa_2 += 8;
313. ENDYUV2RGBLINE(8, 0)
