fix a memory leak in ws2812_buffer_shift by freeing the same amount of bytes we allocated before
fix a memory leak in ws2812_buffer_shift by freeing the same amount of bytes we allocated before

marcelstoer/nodemcu-firmware,vsky279/nodemcu-firmware,nodemcu/nodemcu-firmware,nwf/nodemcu-firmware,nwf/nodemcu-firmware,HEYAHONG/nodemcu-firmware,HEYAHONG/nodemcu-firmware,HEYAHONG/nodemcu-firmware,nodemcu/nodemcu-firmware,vsky279/nodemcu-firmware,FelixPe/nodemcu-firmware,vsky279/nodemcu-firmware,eku/nodemcu-firmware,vsky279/nodemcu-firmware,HEYAHONG/nodemcu-firmware,marcelstoer/nodemcu-firmware,marcelstoer/nodemcu-firmware,eku/nodemcu-firmware,nodemcu/nodemcu-firmware,FelixPe/nodemcu-firmware,nodemcu/nodemcu-firmware,nodemcu/nodemcu-firmware,vsky279/nodemcu-firmware,HEYAHONG/nodemcu-firmware,FelixPe/nodemcu-firmware,nwf/nodemcu-firmware,eku/nodemcu-firmware,marcelstoer/nodemcu-firmware,FelixPe/nodemcu-firmware,FelixPe/nodemcu-firmware,marcelstoer/nodemcu-firmware,eku/nodemcu-firmware,nwf/nodemcu-firmware,nwf/nodemcu-firmware