video/sws_utils: limit sws-cvs and sws-chs to [-100, 100]

Makes no sense to create filters with some huge offsets.

video/sws_utils.c

@@ -73,8 +73,8 @@ const struct m_sub_options sws_conf = {
             {"spline",          SWS_SPLINE})},
         {"lgb", OPT_FLOAT(lum_gblur), M_RANGE(0, 100.0)},
         {"cgb", OPT_FLOAT(chr_gblur), M_RANGE(0, 100.0)},
-        {"cvs", OPT_INT(chr_vshift)},
-        {"chs", OPT_INT(chr_hshift)},
+        {"cvs", OPT_INT(chr_vshift), M_RANGE(-100, 100)},
+        {"chs", OPT_INT(chr_hshift), M_RANGE(-100, 100)},
         {"ls", OPT_FLOAT(lum_sharpen), M_RANGE(-100.0, 100.0)},
         {"cs", OPT_FLOAT(chr_sharpen), M_RANGE(-100.0, 100.0)},
         {"fast", OPT_BOOL(fast)},