Fixing usage of my_strndup() to new prototype.

sql/ha_federated.cc

@@ -629,8 +629,7 @@ static int parse_url(FEDERATED_SHARE *share, TABLE *table,
   DBUG_PRINT("info", ("Length: %d", table->s->connect_string.length));
   DBUG_PRINT("info", ("String: '%.*s'", table->s->connect_string.length, 
                       table->s->connect_string.str));
-  share->scheme= my_strndup((const byte*)table->s->
-                                       connect_string.str, 
+  share->scheme= my_strndup(table->s->connect_string.str,
                             table->s->connect_string.length,
                             MYF(0));
 

sql/log_event.cc

@@ -3175,8 +3175,7 @@ Rotate_log_event::Rotate_log_event(const char* new_log_ident_arg,
                       llstr(pos_arg, buff), flags));
 #endif
   if (flags & DUP_NAME)
-    new_log_ident= my_strndup((const byte*) new_log_ident_arg,
-                                         ident_len, MYF(MY_WME));
+    new_log_ident= my_strndup(new_log_ident_arg, ident_len, MYF(MY_WME));
   DBUG_VOID_RETURN;
 }
 #endif
@@ -3199,9 +3198,7 @@ Rotate_log_event::Rotate_log_event(const char* buf, uint event_len,
                      (header_size+post_header_len)); 
   ident_offset = post_header_len; 
   set_if_smaller(ident_len,FN_REFLEN-1);
-  new_log_ident= my_strndup((byte*) buf + ident_offset,
-                                       (uint) ident_len,
-                                       MYF(MY_WME));
+  new_log_ident= my_strndup(buf + ident_offset, (uint) ident_len, MYF(MY_WME));
   DBUG_VOID_RETURN;
 }
 

sql/set_var.cc

@@ -1097,7 +1097,7 @@ bool update_sys_var_str(sys_var_str *var_str, rw_lock_t *var_mutex,
   uint new_length= (var ? var->value->str_value.length() : 0);
   if (!old_value)
     old_value= (char*) "";
-  if (!(res= my_strndup((byte*)old_value, new_length, MYF(0))))
+  if (!(res= my_strndup(old_value, new_length, MYF(0))))
     return 1;
   /*
     Replace the old value in such a way that the any thread using
@@ -2632,7 +2632,7 @@ bool update_sys_var_str_path(THD *thd, sys_var_str *var_str,
     old_value= make_default_log_name(buff, log_ext);
     str_length= strlen(old_value);
   }
-  if (!(res= my_strndup((byte*)old_value, str_length, MYF(MY_FAE+MY_WME))))
+  if (!(res= my_strndup(old_value, str_length, MYF(MY_FAE+MY_WME))))
   {
     result= 1;
     goto err;

sql/set_var.h

@@ -1055,7 +1055,7 @@ public:
 	     uint name_length_arg, gptr data_arg)
     :name_length(name_length_arg), data(data_arg)
   {
-    name= my_strndup((byte*) name_arg, name_length, MYF(MY_WME));
+    name= my_strndup(name_arg, name_length, MYF(MY_WME));
     links->push_back(this);
   }
   inline bool cmp(const char *name_cmp, uint length)