Fix another case where we should be using isBeforeInTranslationUnit().

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@163533 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/StaticAnalyzer/Core/PathDiagnostic.cpp b/lib/StaticAnalyzer/Core/PathDiagnostic.cpp
index f51e16c..98a343b 100644
--- a/lib/StaticAnalyzer/Core/PathDiagnostic.cpp
+++ b/lib/StaticAnalyzer/Core/PathDiagnostic.cpp
@@ -325,8 +325,10 @@
       return false;
     SourceLocation XDL = XD->getLocation();
     SourceLocation YDL = YD->getLocation();
-    if (XDL != YDL)
-      return XDL < YDL;
+    if (XDL != YDL) {
+      const SourceManager &SM = XL.getManager();
+      return SM.isBeforeInTranslationUnit(XDL, YDL);
+    }
   }
   PathDiagnostic::meta_iterator XI = X.meta_begin(), XE = X.meta_end();
   PathDiagnostic::meta_iterator YI = Y.meta_begin(), YE = Y.meta_end();