#6 Tcl framework not referenced in OS X build

[Sam Halliday]

On OS X, in the file make.defs, the definition for the TKLIBS variable begins

TKLIBS = -framework Tk -framework Tk ...

which results in a failed compile. I believe a simple solution is to replace this with

TKLIBS = -framework Tk -framework Tcl

(i.e. the second framework is Tcl, not a repeat of Tk)