BUG: fix crash in QL generation when input image size is inferior to ShrinkFactor

Code/BasicFilters/otbStreamingShrinkImageFilter.cxx

@@ -42,6 +42,9 @@ StreamingShrinkImageRegionSplitter
   m_SplitsPerDimension[0] = (regionSize[0] + m_TileDimension - 1) / m_TileDimension;
   m_SplitsPerDimension[1] = regionSize[1] / m_TileSizeAlignment;
 
+  if (m_SplitsPerDimension[1] == 0)
+    m_SplitsPerDimension[1] = 1;
+
   unsigned int numPieces = 1;
   for (unsigned int j = 0; j < ImageDimension; ++j)
     {

Code/BasicFilters/otbStreamingShrinkImageFilter.txx

@@ -133,7 +133,7 @@ PersistentShrinkImageFilter<TInputImage, TOutputImage>
   for (unsigned int i = 0; i < OutputImageType::ImageDimension; ++i)
     {
     shrinkedOutputSpacing[i] = inputSpacing[i] * static_cast<double>(m_ShrinkFactor);
-    shrinkedOutputSize[i] = inputSize[i] / m_ShrinkFactor;
+    shrinkedOutputSize[i] = inputSize[i] > m_ShrinkFactor ? inputSize[i] / m_ShrinkFactor : 1;
 
     // TODO : don't know what to do here.
     // dividing the input index by the shrink factor does not make a lot of sense...