added postprocessing step to fix degenerates in assimp, bacuase trying

to add degenerates violates assertions

PluginCollection-FilePlugins/Plugin-Assimp/AssimpPlugin.cc

@@ -335,9 +335,9 @@ int AssimpPlugin::loadObject(QString _filename) {
 
   const aiScene* scene = NULL;
   if (type_ == DATA_TRIANGLE_MESH)
-    scene = importer.ReadFile(_filename.toStdString(), aiProcess_JoinIdenticalVertices | aiProcess_Triangulate);
+    scene = importer.ReadFile(_filename.toStdString(), aiProcess_JoinIdenticalVertices | aiProcess_Triangulate | aiProcess_FindDegenerates);
   else
-    scene = importer.ReadFile(_filename.toStdString(), aiProcess_JoinIdenticalVertices);
+    scene = importer.ReadFile(_filename.toStdString(), aiProcess_JoinIdenticalVertices | aiProcess_FindDegenerates);
 
   if (!scene) {
     emit log(LOGERR, tr(importer.GetErrorString()));