Don't use deprecated "case" any more.
Don't do unnecessary Tcl_PkgRequire(..., "Tcl", ...), the preceding Tcl_InitStubs() call already does that, both for dynamic loaded as wel as the static case.
Don't use deprecated "case" any more.
Don't do unnecessary Tcl_PkgRequire(..., "Tcl", ...), the preceding Tcl_InitStubs() call already does that, both for dynamic loaded as wel as the static case. 
Disallow Tk 8.5.x to be loaded in any Tcl 8.5 alpha release.