LTH_diag
void LTH_diag(string fn)
This hook expects functions of the form:
void fn()
CLIENT This has no effect if performed on the server
Sets the hook for drawing diagnostic information on screen. The hooked function will be called every frame if the addon its from contains source code. Use drawing functions to provide useful debugging and test information. Since addons are often distributed without source code, the end users will not see anything drawn by this hook.