Fix invalid "size-changed" callback function declaration
"void sensors_set_size(...)" used as a "size-changed" plugin callback was being incorrectly cast to
"gboolean callback(...)" which in case of the AMD64 ABI resulted in the callback() returning whatever was in the
%rax register after the last statement in the body of
"void sensors_set_size()" was executed.
Closes: #15 (closed)
Closes: !17 (closed)
Thanks: Stergios Gemelas @stergem