BUG: fix #686 - don't erase the parameter as soon as it is not readable

Code/Wrappers/QtWidget/otbWrapperQtWidgetInputImageListParameter.cxx

@@ -144,7 +144,6 @@ QtWidgetInputImageListParameter::UpdateImageList()
       std::ostringstream oss;
       oss << "The given file " << m_FileSelectionList[j]->GetFilename() << " is not valid.";
       this->GetModel()->SendLogWARNING(oss.str());
-      m_FileSelectionList[j]->ClearFilename();
       }
     }
 

Code/Wrappers/QtWidget/otbWrapperQtWidgetInputVectorDataListParameter.cxx

@@ -145,7 +145,6 @@ QtWidgetInputVectorDataListParameter::UpdateVectorDataList()
       std::ostringstream oss;
       oss << "The given file " << m_FileSelectionList[j]->GetFilename() << " is not valid.";
       this->GetModel()->SendLogWARNING(oss.str());
-      m_FileSelectionList[j]->ClearFilename();
       }
     }