Merge pull request #257 from circlingthesun/master

Fix build with Qt5

Author: rbrusu

cmake/pcl_find_qt5.cmake

@@ -41,7 +41,7 @@ foreach(qt5_module ${qt5_modules})
     if(${qt5_module}_FOUND)
         include_directories(${${qt5_module}_INCLUDE_DIRS})
         add_definitions(${${qt5_module}_DEFINITIONS})
-        list(APPEND CMAKE_CXX_FLAGS ${${qt5_module}_EXECUTABLE_COMPILE_FLAGS})
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${${qt5_module}_EXECUTABLE_COMPILE_FLAGS}")
         list(APPEND QT_LIBRARIES ${${qt5_module}_LIBRARIES})
     endif()
 endforeach()