VortexFrame * vortex_frame_join_extending ( VortexFrame a,
VortexFrame b 

Allows to join two frames, without allocating a new one but, reusing memory allocated by the first frame, saving memory an memory dumping operations.

This function is the same as vortex_frame_join. However, it returns a copy to a new frame joined, reusing memory used by the frame a. Once finished this function, the frame a can't be used.

a The frame to use as base for the resulting frame.
b The frame to add.
The new frame reference, contaning the union.