Supppress warning for ImageSeriesFileReader.txx and testing associate

Code/IO/otbImageSeriesFileReader.txx

@@ -221,7 +221,7 @@ ImageSeriesFileReader< TImage >
     }
     else if ( strcmp( this->GetOutput()->GetNameOfClass(), "VectorImage" ) == 0 )
     {
-      if ( bands[ bands.size()-1 ] != bands.size() )
+      if ( bands[ bands.size()-1 ] != static_cast<int>(bands.size()) )
       {
         std::cerr << "Perform bands selection on VectorImage\n";
       }

Testing/Code/IO/otbImageSeriesFileReader.cxx

@@ -75,7 +75,7 @@ int otbImageSeriesFileReader(int argc, char* argv[] )
 
   typedef otb::StreamingImageFileWriter<ImageType> WriterType;
 
-  for ( int i = 0; i < imageList->Size(); i++ )
+  for ( unsigned int i = 0; i < imageList->Size(); i++ )
   {
     itk::OStringStream title;
     title << "Image no " << i;