Unused variable warnings and static analysis fixes

[Google Code Exporter]

What steps will reproduce the problem?
1. Compile in release mode or
2. Perform static analysis

What version of the product are you using? On what operating system?
Revision 313, Mac OS X 10.9.4 (Xcode 5.1)

Please provide any additional information below.
I've attached a patch.

Original issue reported on code.google.com by [e-mail] on 29 Aug 2014 at 6:47

Attachments:

• warning_fixes.patch

[Google Code Exporter]

Changed my fix in b2ChainShape::CreateLoop() to match the one in 
b2ChainShape::CreateChain().

Original comment by [e-mail] on 29 Aug 2014 at 7:00

Attachments:

• warning_fixes.patch