[GRASS5] free/alloc/calloc/malloc/realloc cleanup

[Markus Neteler]

Hi,

with another fancy script written by G. Antoniol,
Ecole Polytechnique Montreal, Canada, we polished today
in the module section

- free()    -> G_free()
- malloc()  -> G_malloc()
- alloc()   -> G_alloc()
- calloc()  -> G_calloc()
- realloc() -> G_realloc()

We also added 
 #include "gis.h"
where needed.

About 200 files are affected. Things should work as
before.

Markus