Generated duplicit associated value for enum variant

[DolajoCZ]

For enums where you define values for some variants can flatc generate same value for multiple variants.

Simple example:

enum Color : byte { Red = 4, Green = 3, Blue }

In this case is Red = 4 and flatc generate Blue=4. Then if you serialize Color:Blue and then deserialize back you get Color:Red.

It should generate next available value, not only next value from previous as it is write now. Or at least some error/warning during compilation of fbs schema.