Parser infinite loop on open brace

[galpeter]

The js parser goes into an infinite loop if the input file contains this:

{

The engine loops in the preparse_scope (jerry-core/parser/js/parser.cpp) method.

[sand1k]

Thank you. We will take a look.
P.S. You are already using new labels, created a minute ago ^_^

[ruben-ayrapetyan]

Pull request with fix: #236