make 4.0 q option return value change

[Krzysztof Cieniuch]

Hi,

Given following makefile in empty directory:
#==================
.PHONY: all

all: cap

cap:
    touch $(@)
#==================

Running make 3.81 from command line gives different exit code then 4.0 i.e

make 3.81
/usr/bin/make  -q ; echo $?
1

make 4.0
/opt/make-4.0/bin/make  -q ; echo $?
2


so 3.81 correctly reports that target is out of date (since there is no 
cap file in current dir)
but make 4.0 reports that there is error  but no error message is 
actually printed.
Was there any (undocumented) change in exit codes interpretation for -q 
option ?

Thanks
Chris