libswscale/yuv2rgb.c:266: error: Uninitialized Value
  The value read from pa_2 was never initialized.

libswscale/yuv2rgb.c:266:5: 
264.     PUTRGBA(dst_1, py_1, pa_2, 3, 24);
265.     pa_1 += 8; \
266.     pa_2 += 8; \
         ^
267. ENDYUV2RGBLINE(8)
268.     LOADCHROMA(0);
