[patch] Fix a crash when displaying variables from shared library.

[Joel Brobecker]

> 2009-03-06  Paul Pluzhnikov  <ppluzhnikov@google.com>
> 
> 	    * solib.c (solib_contains_address_p): New function.
> 	    (solib_name_from_address): Use it.
> 	    * printcmd.c (display_uses_solib_p): Use it.
> 	    * solib.h (solib_contains_address_p): Declare it.

Looks great to me. Go ahead and check it in.

Thanks,
-- 
Joel