timetable.sty: enable cmyk colors

timetable/timetable.sty

@@ -566,6 +566,12 @@
     \definecolor{@timetable#1text} {rgb}{#5, #6, #7}
   }
 
+\newcommand{\defineeventcmyk}[9]
+  {
+    \definecolor{@timetable#1block}{cmyk}{#2, #3, #4, #5}
+    \definecolor{@timetable#1text} {cmyk}{#6, #7, #8, #9}
+  }
+
 \newcommand{\setslotsize}[2]
   {
     % Arguments: <width> <height>