Merge branch 'master' of https://github.com/assimp/assimp into implementation_warning_fix

# Conflicts:
#	code/AMFImporter_Postprocess.cpp
#	code/FBXConverter.cpp
#	code/IFCLoader.cpp
#	code/NDOLoader.cpp
#	code/glTFAsset.inl

code/ObjFileParser.cpp

@@ -451,6 +451,7 @@ void ObjFileParser::getFace( aiPrimitiveType type ) {
         DefaultLogger::get()->error("Obj: Ignoring empty face");
         // skip line and clean up
         m_DataIt = skipLine<DataArrayIt>( m_DataIt, m_DataItEnd, m_uiLine );
+        delete face;
         return;
     }