libswscale/yuv2rgb.c:294: error: Uninitialized Value
  The value read from pa_2 was never initialized.

libswscale/yuv2rgb.c:294:5: 
292.     PUTRGBA(dst_1, py_1, pa_1, 3, 0);
293.     pa_1 += 8; \
294.     pa_2 += 8; \
         ^
295. ENDYUV2RGBLINE(8)
296.     LOADCHROMA(0);
