70_Pushover.pm: Now returning undef, if set was successful and timestamp is casted to integer.
70_Pushover.pm: Now returning undef, if set was successful and timestamp is casted to integer.View Changes
Source: 70_Pushover.pm: Now returning undef, if set was successful and timestamp is casted to integer. (http://sourceforge.net/p/fhem/code/7252/)