Fix compiler warning

[Mark Kettenis]

   Date: Fri, 14 Jul 2000 13:29:14 -0700
   From: "H . J . Lu" <hjl@lucon.org>

   On Fri, Jul 14, 2000 at 10:27:32PM +0200, Mark Kettenis wrote:
   > Subject says it all.
   > 
   > Mark
   > 
   > 
   > 2000-07-14  Mark Kettenis  <kettenis@gnu.org>
   > 
   > 	* dlfcn/dlerror.c (free_key_mem): Add cast to silence compiler
   > 	warning.
   > 
   > 
   > Index: dlfcn/dlerror.c
   > ===================================================================
   > RCS file: /cvs/glibc/libc/dlfcn/dlerror.c,v
   > retrieving revision 1.5
   > diff -u -p -r1.5 dlerror.c
   > --- dlfcn/dlerror.c	2000/07/13 19:39:54	1.5
   > +++ dlfcn/dlerror.c	2000/07/14 20:26:35
   > @@ -159,7 +159,7 @@ free_key_mem (void *mem)
   >  
   >    if (result->errstring != NULL
   >        && strcmp (result->errstring, "out of memory") != 0)
   > -    free (result->errstring);
   > +    free ((char *)result->errstring);
   >  

   Why not (void *) which is used in prototype?

A matter of taste I think.  The cast is neccessary to get rid of the
"const", not because it isn't a pointer type.  There are a couple of
similar cases in the same file and Ulrich used (char *) there too.

By the way, to be consistent with the rest of the code there should be
a space between (char *) and result->errstring.

Mark