[Spinnaker] Correct Spinnaker_C preset to bring back enum generation for 'spinError'

[jpsacha]

After JavaCPP fix #477, enum for spinError was no longer generated. Add line in Spinaker_C preset to force enum generation and make sure that it is correctly named in generated Java code.

Large part of the diff is due to enums in generated code no longer having prefix "_"

[jpsacha]

I used the suggestion and updated PR.

By the way, I noticed that some wrappers have different return values, some have spinError , some @Cast("spinError") int. For instance, in lines 6033-6035 of global/Spinnaker_C.java. Notice second method has return int. This is similar to previous code on master l.6033:

    public static native spinError spinNodeIsImplemented(spinNodeHandle hNode, @Cast("bool8_t*") BytePointer pbResult);
    public static native @Cast("spinError") int spinNodeIsImplemented(spinNodeHandle hNode, @Cast("bool8_t*") ByteBuffer pbResult);
    public static native spinError spinNodeIsImplemented(spinNodeHandle hNode, @Cast("bool8_t*") byte[] pbResult);

I do not know what to make up of this.
Is the generation of that int return a bug or an intentional behavior (signature variants) of JavaCPP?

[saudet]

I do not know what to make up of this.
Is the generation of that int return a bug or an intentional behavior (signature variants) of JavaCPP?

Yes, those are just alternative overloads of the same function. You can ignore them if you don't need them.