Error in git citool

Hello,

from time to time after heavily mixing vim and partial staging and unstaging I hit from time to time:

	Application Error
	can't read "file_states()": no such element in array
	can't read "file_states()": no such element in array
	    while executing
	"set s $file_states($path)"
	    (procedure "handle_empty_diff" line 6)
	    invoked from within
	"handle_empty_diff"
	    (procedure "read_diff" line 129)
	    invoked from within
	"read_diff file6 {0.0 {force_first_diff ui_ready}}"

My tcl/tk magic is very limited, so maybe this is obvious for someone else.

(BTW, this happens using Debian's git 1:1.7.2.3-2.2)

Best regards Uwe