ease build without tcl

git-svn-id: https://hamlib.svn.sourceforge.net/svnroot/hamlib/trunk@2900 7ae35d74-ebe9-4afe-98af-79ac388436b8

configure.ac

@@ -293,8 +293,8 @@ AC_ARG_ENABLE([tcl-binding],
 	[build_tcl=$enableval],
 	[build_tcl=no])
 AC_MSG_RESULT($build_tcl)
-SC_PATH_TCLCONFIG
 if test x"${build_tcl}" = "xyes"; then
+	SC_PATH_TCLCONFIG
 	SC_LOAD_TCLCONFIG
 	tcl_save_CPPFLAGS=$CPPFLAGS
 	CPPFLAGS="$CPPFLAGS $TCL_INCLUDE_SPEC"