Bad error message for something that's questionably valid

[Dan Willemsen]

This isn't what people want to do anyway, but the error message looks like a kati problem, when it's really a Makefile problem (and maybe a kati problem if what is breaking is technically valid):

Makefile:

define var
VAR:=1
endef

$(call var)

$(info SUCCESS)

make output:

SUCCESS
make: *** No rule to make target `=1', needed by `VAR'.  Stop.

ckati output:

parser.cc:584: sep != 0

[Shinichiro Hamaji]

Here's another testcase for the record:

test: =foo