This commit adds some code to the `set_foliage_palette` function which checks for the `param2` of the foliage node in question to see whether or not said `param2` value is `0` upon first being generated.
If it isn't, then it's safe to assume that said foliage is a vine, and therefore needs to use the other method of calculating the final `param2` value.
d8d83dd21c