[PATCH] Avoid compilation failure with remote-m32r-sdi.o

[Doug Evans <dje at google dot com>]

Hi.

I'm tripping over this with --enable-targets=all.

../../binutils-gdb/gdb/remote-m32r-sdi.c: In function 'm32r_open':
../../binutils-gdb/gdb/remote-m32r-sdi.c:411:21: error: 'val' may be used  
uninitialized in this function [-Werror=maybe-uninitialized]
   max_access_breaks = recv_char_data ();
                     ^
../../binutils-gdb/gdb/remote-m32r-sdi.c:401:22: error: 'val' may be used  
uninitialized in this function [-Werror=maybe-uninitialized]
   max_ib_breakpoints = recv_char_data ();
                      ^
cc1: all warnings being treated as errors

The code here isn't checking the return code of recv_data:

static unsigned char
recv_char_data (void)
{
  unsigned char val = 0;

  recv_data (&val, 1);
  return val;
}

I don't want to spend too much time on this, so for now
I'm just fixing the compilation failure.

2016-02-03  Doug Evans  <dje@google.com>

	* remote-m32r-sdi.c (recv_char_data): Initialize val to avoid
	compiler warning.
	(recv_long_data): Ditto.

diff --git a/gdb/remote-m32r-sdi.c b/gdb/remote-m32r-sdi.c
index c1bd858..2d3a1ad 100644
--- a/gdb/remote-m32r-sdi.c
+++ b/gdb/remote-m32r-sdi.c
@@ -270,7 +270,7 @@ send_three_arg_cmd (unsigned char cmd, unsigned long  
arg1, unsigned long arg2,
 static unsigned char
 recv_char_data (void)
 {
-  unsigned char val;
+  unsigned char val = 0; /* -Wall */

   recv_data (&val, 1);
   return val;
@@ -279,7 +279,7 @@ recv_char_data (void)
 static unsigned long
 recv_long_data (void)
 {
-  unsigned long val;
+  unsigned long val = 0; /* -Wall */

   recv_data (&val, 4);
   return ntohl (val);