Revision 31174: f18.js: avoid error message if the speaker is not visible (Forum #144593)
f18.js: avoid error message if the speaker is not visible (Forum: #144593)
Source: Revision 31174: f18.js: avoid error message if the speaker is not visible (Forum #144593) (http://svn.fhem.de/trac/changeset/31174/trunk)