fix save_frames parameter

apps/interactive-calibration/parametersController.cpp

@@ -89,7 +89,7 @@ bool calib::parametersController::loadFromParser(cv::CommandLineParser &parser)
     mCapParams.captureDelay = parser.get<float>("d");
     mCapParams.squareSize = parser.get<float>("sz");
     mCapParams.templDst = parser.get<float>("dst");
-    mCapParams.saveFrames = parser.has("save_frames");
+    mCapParams.saveFrames = parser.get<bool>("save_frames");
     mCapParams.zoom = parser.get<float>("zoom");
 
     if(!checkAssertion(mCapParams.squareSize > 0, "Distance between corners or circles must be positive"))