set QVTK library in release and debug mode

for demands that need to link libraries in debug mode

CMakeLists.txt

@@ -370,7 +370,9 @@ if(WITH_VTK AND NOT ANDROID)
     if (PCL_SHARED_LIBS OR
         (NOT (PCL_SHARED_LIBS) AND NOT (VTK_BUILD_SHARED_LIBS)))
       set(VTK_FOUND TRUE)
-      find_package (QVTK)
+      find_library (QVTK_LIBRARY_DEBUG NAMES "@QVTK_LIBRARY_DEBUG_NAME@")
+      find_library (QVTK_LIBRARY_RELEASE NAMES "@QVTK_LIBRARY_RELEASE_NAME@")
+      set(QVTK_LIBRARY optimized ${QVTK_LIBRARY_RELEASE} debug ${QVTK_LIBRARY_DEBUG}) 
       if (${VTK_MAJOR_VERSION} VERSION_LESS "6.0")
          message(STATUS "VTK found (include: ${VTK_INCLUDE_DIRS}, lib: ${VTK_LIBRARY_DIRS})")
          link_directories(${VTK_LIBRARY_DIRS})