-Wpointer-sign: bookmarks.

-Wpointer-sign: bookmarks.

Bookmarks are opaque to the core code -- by design, the target is free
to use any sort of blob as bookmark identifier.

The record target chooses to use strings for bookmarks.  This adds
casts following that direction, fixing -Wpointer-sign warnings.

gdb/
2013-04-19  Pedro Alves  <palves@redhat.com>

	* record-full.c (record_full_get_bookmark): Change local 'ret'
	type to char * and add cast to gdb_byte *.
	(record_full_goto_bookmark): Handle 'bookmark' argument as a
	string.
	* reverse.c (goto_bookmark_command): Add casts to gdb_byte *.