Bode plot segmentation violation
Changed the check at the start of the TLGFilterWizWindow::PlotBode function to only check if fCurModule is valid and break out of the function if it is not. '!Update (kFALSE)' appears to always be false, hence the 'return retNull;' call could never be reached. This appears to fix the segmentation violation that occurs if plot bode is clicked when there is no filter file loaded.
Closes #344 (closed).
Edited by Patrick Thomas