Runtime error when plotting with TQDefaultPlotter in 19.06.1

After updating to the 19.06.1 tag (from 19.04.1) I get the following error when trying to make some plots with the TQDefaultPlotter without a ratio plot (the ratio plot is disabled because of #271 (closed)).

Traceback (most recent call last):
  File "/home/br1033/bbll/CAFbbll/share/visualize.py", line 88, in <module>
    main(config)    
  File "/home/br1033/bbll/CAFbbll/share/visualize.py", line 53, in main
    visualize.makePlots(config, reader, summary, channelsDict, outputdir, campaignsDict=campaignsDict)
  File "/home/br1033/bbll/CAFbbll/build/x86_64-slc6-gcc62-opt/python/CommonAnalysisHelpers/visualize.py", line 580, in makePlots
    if not skipallplots and not plotter.plotAndSaveAs(h, pathManager.getLocalPath(histname),plottagsLocal):
TypeError: none of the 4 overloaded methods succeeded. Full details:
  bool TQPlotter::plotAndSaveAs(const TString& histogram, const TString& saveAs, const char* inputTags) =>
    could not convert argument 3 (expected string or Unicode object, TQTaggable found)
  bool TQPlotter::plotAndSaveAs(const TString& histogram, const TString& saveAs, const TString& inputTags) =>
    could not convert argument 3
  bool TQPlotter::plotAndSaveAs(const TString& histogram, const TString& saveAs, TQTaggable& inputTags) =>
    unable to obtain sub pad! (C++ exception of type runtime_error)
  bool TQPlotter::plotAndSaveAs(const TString& histogram, const TString& saveAs, TQTaggable* inputTags = 0) =>
    unable to obtain sub pad! (C++ exception of type runtime_error)

This is caused by this commit: 124d578e

I think it should be

if(subplot != None){

and not

if(!subplot != None){