libswscale/yuv2rgb.c:321: error: Uninitialized Value
  The value read from pa_1 was never initialized.

libswscale/yuv2rgb.c:321:5: 
319.     PUTRGBA(dst_2, py_2, pa_2, 1, 0);
320.     PUTRGBA(dst_1, py_1, pa_1, 1, 0);
321.     pa_1 += 4;
         ^
322.     pa_2 += 4;
323. ENDYUV2RGBLINE(8, 1)
