Fixed Analyzer warnings and crashes when NSError** parameter is nil + Uniformize Code Style
Fixed Analyzer warnings and crashes when NSError** parameter is nil
+ Uniformize Code Style

hirohisa/OHHTTPStubs,JinlianWang/OHHTTPStubs,kazmasaurus/OHHTTPStubs,SummerHanada/OHHTTPStubs,kazmasaurus/OHHTTPStubs,manuyavuz/OHHTTPStubs,liufeigit/OHHTTPStubs,SummerHanada/OHHTTPStubs,tarbrain/OHHTTPStubs,oenius/OHHTTPStubs,tarbrain/OHHTTPStubs,JinlianWang/OHHTTPStubs,tarbrain/OHHTTPStubs,oenius/OHHTTPStubs,manuyavuz/OHHTTPStubs,hirohisa/OHHTTPStubs,hirohisa/OHHTTPStubs,JinlianWang/OHHTTPStubs,liufeigit/OHHTTPStubs,JinlianWang/OHHTTPStubs,bruceflowers/OHHTTPStubs,oenius/OHHTTPStubs,SummerHanada/OHHTTPStubs,bruceflowers/OHHTTPStubs,bruceflowers/OHHTTPStubs,manuyavuz/OHHTTPStubs,sessuru/OHHTTPStubs,kazmasaurus/OHHTTPStubs,sessuru/OHHTTPStubs,virajs/OHHTTPStubs,hirohisa/OHHTTPStubs,virajs/OHHTTPStubs,sessuru/OHHTTPStubs,virajs/OHHTTPStubs,tarbrain/OHHTTPStubs,virajs/OHHTTPStubs,oenius/OHHTTPStubs,SummerHanada/OHHTTPStubs,liufeigit/OHHTTPStubs