changed warnings into debug logs for calls to cancelXXX() where there is no task to be cancelled
changed warnings into debug logs for calls to cancelXXX() where there is no task to be cancelled

marcus-nl/btm,pgbsl/btm,brettwooldridge/btm,leogong/btm,tomsorgie/btm,marcus-nl/btm,brettwooldridge/btm,tomsorgie/btm,Everteam-Software/btm,sshankar/btm,sshankar/btm,veresh/btm,bitronix/btm,gavioto/btm,leogong/btm,gavioto/btm,Everteam-Software/btm,veresh/btm,bitronix/btm,pgbsl/btm