+ /* If this is a down-mouse event, don't reset prefix-arg;
+ pass it to the command run by the up event. */
+ if (EVENT_HAS_PARAMETERS (last_command_event))
+ {
+ Lisp_Object breakdown
+ = parse_modifiers (EVENT_HEAD (last_command_event));
+ int modifiers = XINT (XCAR (XCDR (breakdown)));
+ if (!(modifiers & down_modifier))
+ KVAR (current_kboard, Vprefix_arg) = Qnil;
+ }
+ else
+ KVAR (current_kboard, Vprefix_arg) = Qnil;