[bp/r48363][FIX] PluginModule interface Crash issue fixed on Custom Module Insert Ref:http://dev.tiki.org/item4668.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/11.x@48657 b456876b-0849-0410-b77d-98878d47e9d5