return when OpenCV is found

cmake/templates/OpenCVConfig.cmake.in

@@ -37,15 +37,17 @@
 #
 # ===================================================================================
 
+if(OpenCV_FOUND)
+  return()
+endif()
+set(OpenCV_FOUND TRUE)
+
 set(modules_file_suffix "")
 if(ANDROID)
   string(REPLACE - _ modules_file_suffix "_${ANDROID_NDK_ABI_NAME}")
 endif()
 
-if(NOT OpenCV_FOUND)
+include(${CMAKE_CURRENT_LIST_DIR}/OpenCVModules${modules_file_suffix}.cmake)
-  include(${CMAKE_CURRENT_LIST_DIR}/OpenCVModules${modules_file_suffix}.cmake)
-  set(OpenCV_FOUND TRUE)
-endif()
 
 # TODO All things below should be reviewed. What is about of moving this code into related modules (special vars/hooks/files)