fixed two warnings in gpu sources (-Wshadow, -Wno-sign-promo)

cmake/OpenCVDetectCUDA.cmake

@@ -180,6 +180,9 @@ if(CUDA_FOUND)
       # we remove -Wsign-promo as it generates warnings under linux
       string(REPLACE "-Wsign-promo" "" ${var} "${${var}}")
 
+      # we remove -Wno-sign-promo as it generates warnings under linux
+      string(REPLACE "-Wno-sign-promo" "" ${var} "${${var}}")
+
       # we remove -Wno-delete-non-virtual-dtor because it's used for C++ compiler
       # but NVCC uses C compiler by default
       string(REPLACE "-Wno-delete-non-virtual-dtor" "" ${var} "${${var}}")

modules/core/CMakeLists.txt

@@ -25,7 +25,7 @@ endif()
 
 if(HAVE_CUDA)
   ocv_include_directories("${OpenCV_SOURCE_DIR}/modules/gpu/include")
-  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wundef)
+  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wundef -Wshadow)
 endif()
 
 file(GLOB lib_cuda_hdrs        "include/opencv2/${name}/cuda/*.hpp"        "include/opencv2/${name}/cuda/*.h")

modules/nonfree/CMakeLists.txt

@@ -3,7 +3,7 @@ if(BUILD_ANDROID_PACKAGE)
 endif()
 
 set(the_description "Functionality with possible limitations on the use")
-ocv_warnings_disable(CMAKE_CXX_FLAGS -Wundef)
+ocv_warnings_disable(CMAKE_CXX_FLAGS -Wundef -Wshadow)
 if(ENABLE_DYNAMIC_CUDA)
   add_definitions(-DDYNAMIC_CUDA_SUPPORT)
   ocv_define_module(nonfree opencv_imgproc opencv_features2d opencv_calib3d OPTIONAL opencv_ocl)

modules/superres/CMakeLists.txt

@@ -3,5 +3,5 @@ if(ANDROID OR IOS)
 endif()
 
 set(the_description "Super Resolution")
-ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4127 -Wundef)
+ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4127 -Wundef -Wshadow)
 ocv_define_module(superres opencv_imgproc opencv_video OPTIONAL opencv_gpu opencv_highgui opencv_ocl ${CUDA_LIBRARIES} ${CUDA_npp_LIBRARY})