"Renewc"
  The XSUB-writer's interface to the C "realloc" function, with cast.

  Memory obtained by this should ONLY be freed with "Safefree".

    void  Renewc(void* ptr, int nitems, type, cast)

##</code><code>##

message= (EdjeMessageStringSet*) safemalloc(
  sizeof(EdjeMessageStringSet) + (count-1)*sizeof(char*)
)