libswscale/yuv2rgb.c:238: error: Uninitialized Value
  The value read from pa_1 was never initialized.

libswscale/yuv2rgb.c:238:5: 
236.     PUTRGBA(dst_2,py_2,pa_2,3,0);
237.     PUTRGBA(dst_1,py_1,pa_1,3,0);
238.     pa_1 += 8;\
         ^
239.     pa_2 += 8;\
240. ENDYUV2RGBLINE(8)
