umbrello/umldoc.cpp

- In functions dpiScale and loadExtensionsFromXMI1 use qFuzzyIsNull()
  instead of comparison with 0.0.

umbrello/umlmodel/folder.cpp
- In function activateViews loop over m_diagrams print debug message
  showing UMLScene name() and sceneRect().
- In functions saveContents and loadDiagramsFromXMI1 use qFuzzyIsNull()
  instead of comparison with 0.0.

umbrello/umlviewimageexportermodel.cpp
- In function exportViewToPixmap use qFuzzyIsNull(m_resolution) instead
  of comparing m_resolution with 0.0.