Bugfix. Only makes sense to call apply on "oldCallback" if it's a function
Bugfix. Only makes sense to call apply on "oldCallback" if it's a function

rerobins/strophejs-plugins,joachimlindborg/strophejs-plugins,processone/strophejs-plugins,joachimlindborg/strophejs-plugins,bluecitymoon/strophejs-plugins,adozenlines/strophejs-plugins,ebarbeito/strophejs-plugins,processone/strophejs-plugins,adozenlines/strophejs-plugins,st-gwerner/strophejs-plugins,ebarbeito/strophejs-plugins,rerobins/strophejs-plugins,st-gwerner/strophejs-plugins,bluecitymoon/strophejs-plugins