Curly braces in string literal in function call causes wrong syntax highlinting

[vrabcak]

• VSCode Version: 0.10.11
• OS Version: Windows 7

Steps to Reproduce:

1. Enter function call fn("{};"); anywhere in a C++ file
2. Syntax higlighting for the rest of the file gets confused - the string is not ended correctly

However string literal in an expression works fine, e.g. a = "{}";

[vchegwidden]

+1

• VSCode Version: 0.10.10
• OS Version: Windows 7 & OS X El Capitan

[aeschli]

Duplicate of #4769