Fix GNU build

["Alfred M. Szmidt" <ams@gnu.org>]

Hey,

gdb changed how it handles warnings a while back, and the gnu-nat.c
code hasn't really been maintained that well over the years so it
caused some minor breakage there.  Here is a patch that fixes all
remaining errors and warnings.

Is anyone maintaining the Hurdy bits in GDB?

2006-06-10  Alfred M. Szmidt  <root@gnu.org>

	* gnu-nat.c: Undefine _process_user_ before including
	<hurd/process_request.h>.
	(gnu_resume): Supply missing argument to error().
	(gnu_read_inferior): Add extra parenthesis around arithmetic
	expression to silence warnings from GCC.
	(gnu_write_inferior): Likewise.
	(gnu_xfer_memory): Changed type of MYADDR to `gdb_byte *'.

Index: gnu-nat.c
===================================================================
RCS file: /cvs/src/src/gdb/gnu-nat.c,v
retrieving revision 1.40
diff -u -r1.40 gnu-nat.c
--- gnu-nat.c	11 May 2006 19:37:52 -0000	1.40
+++ gnu-nat.c	10 Jun 2006 21:37:31 -0000
@@ -45,6 +45,9 @@
 #include <hurd/msg.h>
 #include <hurd/msg_request.h>
 #include <hurd/process.h>
+/* Defined by <hurd/process.h>, but we need forward declarations from
+   <hurd/process_request.h> as well, which the same name.  */
+#undef _process_user_ 
 #include <hurd/process_request.h>
 #include <hurd/signal.h>
 #include <hurd/sigpreempt.h>
@@ -1978,7 +1981,7 @@
     {
       struct proc *thread = inf_tid_to_thread (inf, PIDGET (tid));
       if (!thread)
-	error (_("Can't run single thread id %d: no such thread!"));
+	error (_("Can't run single thread id: no such thread!"), inf->pid);
       inf_debug (inf, "running one thread: %d/%d", inf->pid, thread->tid);
       inf_set_threads_resume_sc (inf, thread, 0);
     }
@@ -2257,7 +2260,7 @@
   if (err)
     return 0;
 
-  err = hurd_safe_copyin (myaddr, (void *) addr - low_address + copied, length);
+  err = hurd_safe_copyin (myaddr, (void *) (addr - low_address + copied), length);
   if (err)
     {
       warning (_("Read from inferior faulted: %s"), safe_strerror (err));
@@ -2312,7 +2315,7 @@
 
   deallocate++;
 
-  err = hurd_safe_copyout ((void *) addr - low_address + copied,
+  err = hurd_safe_copyout ((void *) (addr - low_address + copied),
 			   myaddr, length);
   CHK_GOTO_OUT ("Write to inferior faulted", err);
 
@@ -2445,7 +2448,8 @@
 /* Return 0 on failure, number of bytes handled otherwise.  TARGET
    is ignored. */
 static int
-gnu_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
+gnu_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, 
+		 int len, int write,
 		 struct mem_attrib *attrib,
 		 struct target_ops *target)
 {