BUG: mantis 1292 - use nodata only if nodata value are read in the image

Modules/Visualization/Ice/src/otbImageSettings.cxx

@@ -30,7 +30,7 @@ ImageSettings::ImageSettings()
     m_MaxGreen( 255 ),
     m_MinBlue( 0 ),
     m_MaxBlue( 255 ),
-    m_UseNoData( true ),
+    m_UseNoData( false ),
     m_NoData( 0 ),
     m_Gamma( 1. ),
     m_Alpha( 1. ),

Modules/Visualization/MonteverdiCore/src/mvdImageProperties.cxx

@@ -75,7 +75,7 @@ ImageProperties
   m_Flags(),
   m_NoData( ComponentType( 0 ) )
 {
-  m_Flags.m_NoData = true;
+  m_Flags.m_NoData = false;
 }
 
 /*******************************************************************************/