fixed tests (call resetDevice, if there was a gpu failure)

modules/gpu/perf/perf_objdetect.cpp

@@ -89,7 +89,6 @@ PERF_TEST_P(HOG, CalTech, Values<string>("gpu/caltech/image_00000009_0.png", "gp
     SANITY_CHECK(found_locations);
 }
 
-
 ///////////////////////////////////////////////////////////////
 // HaarClassifier
 
@@ -181,4 +180,4 @@ PERF_TEST_P(ImageAndCascade, ObjDetect_LBPClassifier,
     }
 }
 
-} // namespace
+} // namespace