Convert an unsigned to Twine instead of using utostr since we're already building a Twine. NFC

llvm-svn: 259309

clang/lib/StaticAnalyzer/Core/IssueHash.cpp

@@ -180,7 +180,7 @@ std::string clang::GetIssueString(const SourceManager &SM,
 
   return (llvm::Twine(CheckerName) + Delimiter +
           GetEnclosingDeclContextSignature(D) + Delimiter +
-          llvm::utostr(IssueLoc.getExpansionColumnNumber()) + Delimiter +
+          Twine(IssueLoc.getExpansionColumnNumber()) + Delimiter +
           NormalizeLine(SM, IssueLoc, LangOpts) + Delimiter + BugType)
       .str();
 }