libswscale/swscale.c:1261: error: Uninitialized Value
  The value read from A2 was never initialized.

libswscale/swscale.c:1261:5: 
1259.     int i;
1260. 
1261.     YSCALE_YUV_2_ANYRGB_C(YSCALE_YUV_2_RGB2_C, YSCALE_YUV_2_PACKED2_C(void,0), YSCALE_YUV_2_MONO2_C)
          ^
1262. }
1263. 

static void yuv2packed2_c(SwsContext *c, const uint16_t *buf0,
                          const uint16_t *buf1, const uint16_t *ubuf0,
                          const uint16_t *ubuf1, const uint16_t *vbuf0,
                          const uint16_t *vbuf1, const uint16_t *abuf0,
                          const uint16_t *abuf1, uint8_t *dest, int dstW,
                          int yalpha, int uvalpha, int y)
{
    int  yalpha1=4095- yalpha;
    int uvalpha1=4095-uvalpha;
    int i;
    YSCALE_YUV_2_ANYRGB_C(YSCALE_YUV_2_RGB2_C, YSCALE_YUV_2_PACKED2_C(void,0), YSCALE_YUV_2_MONO2_C)
}
['static void yuv2packed2_c(SwsContext *c, const uint16_t *buf0,\n                          const uint16_t *buf1, const uint16_t *ubuf0,\n                          const uint16_t *ubuf1, const uint16_t *vbuf0,\n                          const uint16_t *vbuf1, const uint16_t *abuf0,\n                          const uint16_t *abuf1, uint8_t *dest, int dstW,\n                          int yalpha, int uvalpha, int y)\n{\n    int  yalpha1=4095- yalpha;\n    int uvalpha1=4095-uvalpha;\n    int i;\n    YSCALE_YUV_2_ANYRGB_C(YSCALE_YUV_2_RGB2_C, YSCALE_YUV_2_PACKED2_C(void,0), YSCALE_YUV_2_MONO2_C)\n}']