usr.bin/ar patcg

[Sergey Gluschenko]

Changes:
	- removed the (void) cast of functions that don't use a return value;
	- the envtmp declaration moved into extern.h;
	- type of some pointers to constant string changed from 'char *' to 'char const *';

Now it's WARNS6 clean.

Updated patch file is here: http://xlab.users.sevsky.net/dfly/ar.patch


--
Sergey Gluschenko