demo_view_benchmark.c:125:18: error: static declaration of
'_benchmark_onshow' follows non-static declaration
demo_view_benchmark.c:87:9: note: previous implicit declaration of
'_benchmark_onshow' was here

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2277 bbd45198-f89e-11dd-88c7-29a3b14d5316