libswscale/yuv2rgb.c:212: error: Uninitialized Value
  The value read from pa_2 was never initialized.

libswscale/yuv2rgb.c:212:5: 
210.     PUTRGBA(dst_1,py_1,pa_1,3,0,0);
211.     pa_1 += 8;\
212.     pa_2 += 8;\
         ^
213. ENDYUV2RGBLINE(8)
214.     LOADCHROMA(0);
