Cleanup misc warnings

http://lists.gnu.org/archive/html/bug-bash/2005-12/msg00034.html

--- readline-5.1/bind.c
+++ readline-5.1/bind.c
@@ -1506,8 +1506,6 @@ rl_variable_value (name)
      const char *name;
 {
   register int i;
-  int	v;
-  char *ret;
 
   /* Check for simple variables first. */
   i = find_boolean_var (name);
@@ -2170,7 +2168,6 @@ _rl_get_string_variable_value (name)
 {
   static char numbuf[32];
   char *ret;
-  int n;
 
   if (_rl_stricmp (name, "bell-style") == 0)
     {
--- readline-5.1/callback.c
+++ readline-5.1/callback.c
@@ -43,6 +43,7 @@
 #include "rldefs.h"
 #include "readline.h"
 #include "rlprivate.h"
+#include "xmalloc.h"
 
 /* Private data for callback registration functions.  See comments in
    rl_callback_read_char for more details. */
--- readline-5.1/display.c
+++ readline-5.1/display.c
@@ -1164,7 +1166,7 @@ update_line (old, new, current_line, oma
   int col_lendiff, col_temp;
 #if defined (HANDLE_MULTIBYTE)
   mbstate_t ps_new, ps_old;
-  int new_offset, old_offset, tmp;
+  int new_offset, old_offset;
 #endif
 
   /* If we're at the right edge of a terminal that supports xn, we're
--- readline-5.1/isearch.c
+++ readline-5.1/isearch.c
@@ -67,10 +67,6 @@ static _rl_search_cxt *_rl_isearch_init 
 static void _rl_isearch_fini PARAMS((_rl_search_cxt *));
 static int _rl_isearch_cleanup PARAMS((_rl_search_cxt *, int));
 
-/* Last line found by the current incremental search, so we don't `find'
-   identical lines many times in a row. */
-static char *prev_line_found;
-
 /* Last search string and its length. */
 static char *last_isearch_string;
 static int last_isearch_string_len;
--- readline-5.1/misc.c
+++ readline-5.1/misc.c
@@ -212,6 +212,8 @@ rl_digit_loop ()
       if (r <= 0 || (RL_ISSTATE (RL_STATE_NUMERICARG) == 0))
         break;
     }
+
+  return 0;
 }
 
 /* Create a default argument. */
--- readline-5.1/readline.c
+++ readline-5.1/readline.c
@@ -85,7 +85,7 @@ static void bind_arrow_keys_internal PAR
 static void bind_arrow_keys PARAMS((void));
 
 static void readline_default_bindings PARAMS((void));
-static void reset_default_bindings PARAMS((void));
+/* static void reset_default_bindings PARAMS((void)); */
 
 static int _rl_subseq_result PARAMS((int, Keymap, int, int));
 static int _rl_subseq_getchar PARAMS((int));
@@ -1054,6 +1054,7 @@ readline_default_bindings ()
 
 /* Reset the default bindings for the terminal special characters we're
    interested in back to rl_insert and read the new ones. */
+/* Unused function
 static void
 reset_default_bindings ()
 {
@@ -1063,6 +1064,7 @@ reset_default_bindings ()
       rl_tty_set_default_bindings (_rl_keymap);
     }
 }
+*/
 
 /* Bind some common arrow key sequences in MAP. */
 static void
--- readline-5.1/rltty.c
+++ readline-5.1/rltty.c
@@ -933,7 +933,6 @@ rltty_set_default_bindings (kmap)
 #if !defined (NO_TTY_DRIVER)
   TIOTYPE ttybuff;
   int tty;
-  static int called = 0;
 
   tty = fileno (rl_instream);
 
--- readline-5.1/search.c
+++ readline-5.1/search.c
@@ -70,7 +70,6 @@ static int rl_history_search_pos;
 static char *history_search_string;
 static int history_string_size;
 
-static UNDO_LIST *noninc_saved_undo_list;
 static void make_history_line_current PARAMS((HIST_ENTRY *));
 static int noninc_search_from_pos PARAMS((char *, int, int));
 static int noninc_dosearch PARAMS((char *, int));
--- readline-5.1/text.c
+++ readline-5.1/text.c
@@ -1239,7 +1239,7 @@ rl_change_case (count, op)
 #if defined (HANDLE_MULTIBYTE)
   wchar_t wc, nwc;
   char mb[MB_LEN_MAX+1];
-  int mblen, p;
+  int mblen;
   mbstate_t ps;
 #endif
 
--- readline-5.1/vi_mode.c
+++ readline-5.1/vi_mode.c
@@ -1111,7 +1111,7 @@ int
 rl_vi_rubout (count, key)
      int count, key;
 {
-  int p, opoint;
+  int opoint;
 
   if (count < 0)
     return (rl_vi_delete (-count, key));