fix ObjectLiteral.resolveType (Related to issue#140)

[valq7711]

bugs are fixed:

h = {a: None, b: 123}  # - causes an error because of the trying expected.indexOf("Function"), but expected==null
h = {a: None, b: None} # - is resolved to '{String:null}' - deadlock hash!  '{String:?}' is more suitable, isn't it?
h = {a: def(): ...; , b: def(x): ...;, c: 123} # - is resolved to '{String:Function}', because of the premature return without checking the remaining elements

[valq7711]

@atsepkov
Just for clarity: it doesn't drop typed hash logic, but fixes small bugs and makes the behaviour more expected.
Try h = {a: None, b: 1} - 100% compilation error!