[analyzer] ArrayRef-ize BugReporter::EmitBasicReport.

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@192114 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/StaticAnalyzer/Checkers/CStringSyntaxChecker.cpp b/lib/StaticAnalyzer/Checkers/CStringSyntaxChecker.cpp
index 92c0eef..d29a12a 100644
--- a/lib/StaticAnalyzer/Checkers/CStringSyntaxChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/CStringSyntaxChecker.cpp
@@ -141,7 +141,6 @@
     if (containsBadStrncatPattern(CE)) {
       const Expr *DstArg = CE->getArg(0);
       const Expr *LenArg = CE->getArg(2);
-      SourceRange R = LenArg->getSourceRange();
       PathDiagnosticLocation Loc =
         PathDiagnosticLocation::createBegin(LenArg, BR.getSourceManager(), AC);
 
@@ -159,7 +158,7 @@
       os << "se a safer 'strlcat' API";
 
       BR.EmitBasicReport(FD, "Anti-pattern in the argument", "C String API",
-                         os.str(), Loc, &R, 1);
+                         os.str(), Loc, LenArg->getSourceRange());
     }
   }