ENH: Implemented GDALOverviewsBuilder::GetOverviewsCount().

Modules/IO/IOGDAL/include/otbGDALOverviewsBuilder.h

@@ -94,7 +94,7 @@ public:
   unsigned int
   CountResolutions( unsigned int factor, unsigned int n =0 ) const;
 
-  int GetOverviewsCount() const;
+  unsigned int GetOverviewsCount() const;
 
 
   GDALResampling GetResamplingMethod() const;

Modules/IO/IOGDAL/src/otbGDALOverviewsBuilder.cxx

@@ -121,6 +121,16 @@ GDALOverviewsBuilder
   return count;
 }
 
+/***************************************************************************/
+unsigned int
+GDALOverviewsBuilder
+::GetOverviewsCount() const
+{
+  assert( !m_GdalDataset.IsNull() );
+
+  return m_GdalDataset->GetOverviewsCount();
+}
+
 /***************************************************************************/
 GDALResampling
 GDALOverviewsBuilder