Fix bug that caused matplotlib colormaps not being added even if requested
Fix bug that caused matplotlib colormaps not being added even if requested

pllim/ginga,rupak0577/ginga,stscieisenhamer/ginga,naojsoft/ginga,pllim/ginga,ejeschke/ginga,naojsoft/ginga,ejeschke/ginga,stscieisenhamer/ginga,pllim/ginga,rupak0577/ginga,naojsoft/ginga,ejeschke/ginga,rupak0577/ginga,stscieisenhamer/ginga