Can't build Xfcalendar 4.2.1.1

[Erik Harrison]

My system is pooched, and I needed an Xfce reinstall, so I grabbed the
4.2.1.1 graphical installer. I've been running 4.2.0 for a while.

Running the installer generated this error in Xfcalendar

callbacks.c: In function `manageAppointment':
callbacks.c:182: error: `ctl_start' undeclared (first use in this function)
callbacks.c:182: error: (Each undeclared identifier is reported only once
callbacks.c:182: error: for each function it appears in.)
callbacks.c:182: error: `ctl_end' undeclared (first use in this function)
callbacks.c:183: error: `ctl_text' undeclared (first use in this function)
callbacks.c: In function `on_btClose_clicked':
callbacks.c:213: warning: implicit declaration of function `dialogWin'
gmake[2]: *** [xfcalendar-callbacks.o] Error 1
gmake[2]: *** Waiting for unfinished jobs....
gmake[2]: Leaving directory `/tmp/xfce4-4.2.1.1-installer/xfcalendar/src'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/tmp/xfce4-4.2.1.1-installer/xfcalendar'
gmake: *** [all] Error 2
-- 
CAPS LOCK: ITS LIKE THE CRUISE CONTROL FOR AWESOME
-Erik