weapon.c: Cancel reloading if player switches tools

This cancels weapon reloading if the player switches tools,
this is the behavior that can be observed in the VOXLAP server.exe
and in SpadesX.

Closes xtreme8000#174

src/weapon.c

@@ -66,6 +66,8 @@ void weapon_update() {
 			players[local_player_id].item_disabled = window_time();
 			players[local_player_id].items_show_start = window_time();
 			players[local_player_id].items_show = 1;
+		} else {
+			weapon_reload_inprogress = 0;
 		}
 	} else {
 		if(screen_current == SCREEN_NONE && window_time() - players[local_player_id].item_disabled >= 0.5F) {