TypeError exception when calling #send on a pure objc setter method

[lsansonetti@…]

$ ./miniruby -e "class X; attr_writer :foo; end; X.new.send('foo=', 42)"

$ ./miniruby -e "class X; attr_writer :foo; end; X.new.send('setFoo', 42)"
-e:1:in `send:': 42 is not a symbol (TypeError)
from -e:1:in `setFoo'
from -e:1:in `<main>'

$ ./miniruby -e "class X; attr_writer :foo; end; X.new.send('setFoo:', 42)"
-e:1:in `send:': 42 is not a symbol (TypeError)
	from -e:1:in `setFoo:'
	from -e:1:in `<main>'

[lsansonetti@…]

Fixed in r542/trunk.

Rich, could you revert the hotcocoa change?