Use const void * for keys and values in some hashtable functions

src/plugins/scripts/lua/weechat-lua.c

@@ -131,8 +131,8 @@ weechat_lua_tohashtable (lua_State *interpreter, int index, int hashtable_size)
     while (lua_next (interpreter, index - 1) != 0)
     {
         weechat_hashtable_set (hashtable,
-                               (char *)lua_tostring (interpreter, -2),
-                               (char *)lua_tostring (interpreter, -1));
+                               lua_tostring (interpreter, -2),
+                               lua_tostring (interpreter, -1));
         /* remove value from stack (keep key for next iteration) */
         lua_pop (interpreter, 1);
     }

src/plugins/scripts/python/weechat-python.c

@@ -148,7 +148,7 @@ weechat_python_dict_to_hashtable (PyObject *dict, int hashtable_size)
     {
         str_key = PyString_AsString (key);
         str_value = PyString_AsString (value);
-        weechat_hashtable_set (hashtable, (void *)str_key, (void *)str_value);
+        weechat_hashtable_set (hashtable, str_key, str_value);
     }
     
     return hashtable;

src/plugins/scripts/tcl/weechat-tcl.c

@@ -153,8 +153,8 @@ weechat_tcl_dict_to_hashtable (Tcl_Interp *interp, Tcl_Obj *dict,
         for (; !done ; Tcl_DictObjNext(&search, &key, &value, &done))
         {
             weechat_hashtable_set (hashtable,
-                                   (void *)Tcl_GetString (key),
-                                   (void *)Tcl_GetString (value));
+                                   Tcl_GetString (key),
+                                   Tcl_GetString (value));
         }
     }
     Tcl_DictObjDone(&search);