[PATCH 21/26] -Wpointer-sign: dwarf2read.c.

[Pedro Alves <palves@redhat.com>]

This fixes the remaining issues necessary to make the DWARF reader
-Wpointer-sign clean.  The 'filename' bit should be obvious.
'constant_pool' holds the contents of an obstack, which are 'char *'.
gdb_byte would work too, but it'd need more casts elsewhere, so I just
chose the minimal approach.  Any way would be fine with me.

gdb/
2013-04-11  Pedro Alves  <palves@redhat.com>

	* dwarf2read.c (dwarf2_get_dwz_file): Add cast to const char *.
	(read_index_from_section): Add cast to 'char *'.
---
 gdb/dwarf2read.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 25dcfc9..3ed00cc 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -2093,7 +2093,7 @@ dwarf2_get_dwz_file (void)
 	   bfd_errmsg (bfd_get_error ()));
   cleanup = make_cleanup (xfree, data);
 
-  filename = data;
+  filename = (const char *) data;
   if (!IS_ABSOLUTE_PATH (filename))
     {
       char *abs = gdb_realpath (dwarf2_per_objfile->objfile->name);
@@ -2754,7 +2754,7 @@ to use the section anyway."),
 			     / (2 * sizeof (offset_type)));
   ++i;
 
-  map->constant_pool = addr + MAYBE_SWAP (metadata[i]);
+  map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i]));
 
   return 1;
 }