libswscale/yuv2rgb.c:312: error: Uninitialized Value
  The value read from pa_2 was never initialized.

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