libavfilter/vf_gradfun.c:135: error: Uninitialized Value
  The value read from cpu_flags was never initialized.

libavfilter/vf_gradfun.c:135:21: 
133.     gf->filter_line = ff_gradfun_filter_line_c;
134. 
135.     if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX2)
                         ^
136.         gf->filter_line = ff_gradfun_filter_line_mmx2;
137.     if (HAVE_SSSE3 && cpu_flags & AV_CPU_FLAG_SSSE3)
