Bugs and vulnerabilities in code

[AndreyAlifanov]

Hi, PVS-Studio found bugs in code. Can you fix them?
Thanks in advance.

Message: V1053: Calling the 'done' virtual function indirectly in the constructor may lead to unexpected result at runtime. Check lines: 'json_cursor.hpp:81', 'json_cursor.hpp:358', 'staj_cursor.hpp:1134'.
Type: BUG
Component: jsoncons/json_cursor.hpp
Line: 81

Message: V1053: Calling the 'done' virtual function indirectly in the constructor may lead to unexpected result at runtime. Check lines: 'json_cursor.hpp:152', 'json_cursor.hpp:374', 'staj_cursor.hpp:1134'.
Type: BUG
Component: jsoncons/json_cursor.hpp

Message: [CWE-457] V730: Not all members of a class are initialized inside the constructor. Consider inspecting: selector_.
Type: VULNERABILITY
Component: jsoncons_ext/jsonpath/expression.hpp
Line: 3055

Message: [CWE-691] V1037: Two or more case-branches perform the same actions. Check lines: 105, 111
Type: VULNERABILITY
Component: jsoncons_ext/jsonpath/json_location.hpp
Line: 105

Message: [CWE-670] V581: The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 632, 633.
Type: VULNERABILITY
Component: jsoncons_ext/jsonpath/jsonpath_expression.hpp
Line: 633

[danielaparker]

Fixed on master.