Add Radical 42.0 (小), SC=9, FS=1 as secondary radical.

There is only one RS value for U+5149 光 as 10.4. In 《现代汉语词典》 (Ed. 6), 小 is the primary radical, 儿 is the secondary radical.

We can add Radical 42.0 (小) to U+5149 光 as the secondary one.

Almost all cases of V-source characters with 光 on the left side have 10 as the primary radical. I'm not sure it's a good idea to change. Also, kRSUnicode for 光 is 10, not 42. We should change that.