ccvt_c.c: In function ‘ccvt_yuyv’:
ccvt_c.c:256:17: warning: variable ‘linewidth’ set but not used [-Wunused-but-set-variable]
ccvt_c.c: In function ‘ccvt_uyvy’:
ccvt_c.c:353:17: warning: variable ‘linewidth’ set but not used [-Wunused-but-set-variable]
