Fix mutex lock issues (OCR and FR)

modules/ANSODEngine/CNNFaceDetector.cpp

@@ -73,6 +73,7 @@ namespace ANSCENTER {
         std::vector<Object> output;
         output.clear();
         if (!_licenseValid) {
+    	if (_modelLoading.load()) return {};
             this->_logger.LogError("ANSCNNFD::RunInference", "Invalid license", __FILE__, __LINE__);
             return output;
         }