COV: Fixing coverity issues (uninitialized scalar field)

Code/IO/otbImageFileWriter.txx

@@ -470,7 +470,7 @@ ImageFileWriter<TInputImage>
 
     if(imageIO.IsNull())
       {
-      otb::ImageFileWriterException e(__FILE__, __LINE__);
+      itk::ImageFileWriterException e(__FILE__, __LINE__);
       std::ostringstream msg;
       msg << " ImageIO is of kind GDALImageIO, but fails to dynamic_cast (this should never happen)."<< std::endl;
       e.SetDescription(msg.str().c_str());

Code/IO/otbMapFileProductWriter.txx

@@ -29,7 +29,7 @@ namespace otb
  */
 template <class TInputImage>
 MapFileProductWriter<TInputImage>
-::MapFileProductWriter(): m_TileSize(256), m_SRID(26918)
+::MapFileProductWriter(): m_TileSize(256), m_SRID(26918), m_CurrentDepth(0)
 {
   m_GenericRSResampler = GenericRSResamplerType::New();